diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 8ebd3bd..392ab39 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -9,7 +9,8 @@
       "Bash(python3:*)",
       "mcp__figma__get_figma_data",
       "mcp__figma__download_figma_images",
-      "Bash(npx tsc:*)"
+      "Bash(npx tsc:*)",
+      "Bash(grep:*)"
     ]
   }
 }
diff --git a/index.css b/index.css
index 40e2078..e214c77 100644
--- a/index.css
+++ b/index.css
@@ -765,6 +765,87 @@
   white-space: nowrap;
 }
 
+/* Sidebar Language Switch */
+.sidebar-language-switch {
+  padding: 0 1rem 0.75rem;
+  display: flex;
+  justify-content: flex-start;
+}
+
+/* Toggle container */
+.lang-toggle {
+  position: relative;
+  display: flex;
+  background: rgba(255, 255, 255, 0.08);
+  border-radius: 999px;
+  padding: 2px;
+  width: 100%;
+  max-width: 120px;
+}
+
+.lang-toggle-option {
+  flex: 1;
+  position: relative;
+  z-index: 1;
+  padding: 4px 0;
+  font-size: 11px;
+  font-weight: 600;
+  letter-spacing: 0.03em;
+  color: rgba(255, 255, 255, 0.4);
+  background: none;
+  border: none;
+  cursor: pointer;
+  transition: color 0.3s ease;
+  text-align: center;
+}
+
+.lang-toggle-option.active {
+  color: #ffffff;
+}
+
+.lang-toggle-option:hover:not(.active) {
+  color: rgba(255, 255, 255, 0.6);
+}
+
+/* Sliding indicator */
+.lang-toggle-slider {
+  position: absolute;
+  top: 2px;
+  bottom: 2px;
+  width: calc(50% - 2px);
+  background: rgba(255, 255, 255, 0.15);
+  border-radius: 999px;
+  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+  pointer-events: none;
+}
+
+.lang-toggle-slider.left {
+  transform: translateX(2px);
+}
+
+.lang-toggle-slider.right {
+  transform: translateX(calc(100% + 2px));
+}
+
+/* Collapsed state - simple button */
+.lang-toggle-collapsed {
+  padding: 4px 6px;
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: 0.03em;
+  color: rgba(255, 255, 255, 0.5);
+  background: rgba(255, 255, 255, 0.08);
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+  transition: all 0.3s ease;
+}
+
+.lang-toggle-collapsed:hover {
+  color: #ffffff;
+  background: rgba(255, 255, 255, 0.15);
+}
+
 /* Logout Button */
 .logout-btn {
   width: 100%;
@@ -6125,6 +6206,17 @@
   object-fit: contain;
 }
 
+.header-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.header-actions .lang-toggle {
+  max-width: 100px;
+  padding: 2px;
+}
+
 .header-login-btn {
   padding: 10px 24px;
   border-radius: 999px;
diff --git a/package-lock.json b/package-lock.json
index b4bf9ab..60a8d5f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,8 +8,10 @@
       "name": "castad---marketing-automation",
       "version": "0.0.0",
       "dependencies": {
+        "i18next": "^25.8.4",
         "react": "^19.2.3",
-        "react-dom": "^19.2.3"
+        "react-dom": "^19.2.3",
+        "react-i18next": "^16.5.4"
       },
       "devDependencies": {
         "@types/node": "^22.14.0",
@@ -253,6 +255,15 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.28.6",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.6.tgz",
+      "integrity": "sha512-05WQkdpL9COIMz4LjTxGpPNCdlpyimKppYNoJ5Di5EUObifl8t4tuLuUBBZEpoLYOmfvIWrsp9fCl0HoPRVTdA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@babel/template": {
       "version": "7.27.2",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.27.2.tgz",
@@ -1385,6 +1396,47 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/html-parse-stringify": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/html-parse-stringify/-/html-parse-stringify-3.0.1.tgz",
+      "integrity": "sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg==",
+      "license": "MIT",
+      "dependencies": {
+        "void-elements": "3.1.0"
+      }
+    },
+    "node_modules/i18next": {
+      "version": "25.8.4",
+      "resolved": "https://registry.npmjs.org/i18next/-/i18next-25.8.4.tgz",
+      "integrity": "sha512-a9A0MnUjKvzjEN/26ZY1okpra9kA8MEwzYEz1BNm+IyxUKPRH6ihf0p7vj8YvULwZHKHl3zkJ6KOt4hewxBecQ==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://locize.com"
+        },
+        {
+          "type": "individual",
+          "url": "https://locize.com/i18next.html"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+        }
+      ],
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@babel/runtime": "^7.28.4"
+      },
+      "peerDependencies": {
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -1533,6 +1585,33 @@
         "react": "^19.2.3"
       }
     },
+    "node_modules/react-i18next": {
+      "version": "16.5.4",
+      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-16.5.4.tgz",
+      "integrity": "sha512-6yj+dcfMncEC21QPhOTsW8mOSO+pzFmT6uvU7XXdvM/Cp38zJkmTeMeKmTrmCMD5ToT79FmiE/mRWiYWcJYW4g==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.28.4",
+        "html-parse-stringify": "^3.0.1",
+        "use-sync-external-store": "^1.6.0"
+      },
+      "peerDependencies": {
+        "i18next": ">= 25.6.2",
+        "react": ">= 16.8.0",
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        },
+        "react-native": {
+          "optional": true
+        },
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-refresh": {
       "version": "0.18.0",
       "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.18.0.tgz",
@@ -1632,8 +1711,9 @@
       "version": "5.8.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
       "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
-      "dev": true,
+      "devOptional": true,
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -1680,6 +1760,15 @@
         "browserslist": ">= 4.21.0"
       }
     },
+    "node_modules/use-sync-external-store": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/use-sync-external-store/-/use-sync-external-store-1.6.0.tgz",
+      "integrity": "sha512-Pp6GSwGP/NrPIrxVFAIkOQeyw8lFenOHijQWkUTrDvrF4ALqylP2C/KCkeS9dpUM3KvYRQhna5vt7IL95+ZQ9w==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0 || ^18.0.0 || ^19.0.0"
+      }
+    },
     "node_modules/vite": {
       "version": "6.4.1",
       "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.1.tgz",
@@ -1756,6 +1845,15 @@
         }
       }
     },
+    "node_modules/void-elements": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
+      "integrity": "sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
diff --git a/package.json b/package.json
index 9a5bec1..a5987f3 100755
--- a/package.json
+++ b/package.json
@@ -9,8 +9,10 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "i18next": "^25.8.4",
     "react": "^19.2.3",
-    "react-dom": "^19.2.3"
+    "react-dom": "^19.2.3",
+    "react-i18next": "^16.5.4"
   },
   "devDependencies": {
     "@types/node": "^22.14.0",
diff --git a/src/App.tsx b/src/App.tsx
index 70760f4..5976e0f 100755
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,5 +1,6 @@
 
 import React, { useRef, useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import Header from './components/Header';
 import HeroSection from './pages/Landing/HeroSection';
 import WelcomeSection from './pages/Landing/WelcomeSection';
@@ -43,6 +44,7 @@ const initializeOnNewSession = () => {
 initializeOnNewSession();
 
 const App: React.FC = () => {
+  const { t } = useTranslation();
   const containerRef = useRef<HTMLElement>(null);
 
   // localStorage에서 저장된 상태 복원 (새 세션이면 이미 초기화됨)
@@ -148,7 +150,7 @@ const App: React.FC = () => {
       }
     } catch (err) {
       console.error('Token callback failed:', err);
-      alert('로그인 처리에 실패했습니다. 다시 시도해주세요.');
+      alert(t('app.loginFailed'));
     } finally {
       setIsProcessingCallback(false);
     }
@@ -162,7 +164,7 @@ const App: React.FC = () => {
       window.location.href = response.redirect_url;
     } catch (err) {
       console.error('Kakao callback failed:', err);
-      alert('카카오 로그인에 실패했습니다. 다시 시도해주세요.');
+      alert(t('app.kakaoLoginFailed'));
 
       // URL에서 code 파라미터 제거
       const url = new URL(window.location.href);
@@ -265,7 +267,7 @@ const App: React.FC = () => {
 
       // 응답 유효성 검사
       if (!validateCrawlingResponse(data)) {
-        throw new Error('유효하지 않은 URL입니다. 네이버 지도 URL을 입력해주세요.');
+        throw new Error(t('app.invalidUrl'));
       }
 
       setAnalysisData(data);
@@ -273,7 +275,7 @@ const App: React.FC = () => {
       setViewMode('analysis');
     } catch (err) {
       console.error('Crawling failed:', err);
-      const errorMessage = err instanceof Error ? err.message : '분석 중 오류가 발생했습니다. 다시 시도해주세요.';
+      const errorMessage = err instanceof Error ? err.message : t('app.analysisError');
       setError(errorMessage);
       setViewMode('landing');
     }
@@ -289,7 +291,7 @@ const App: React.FC = () => {
 
       // 응답 유효성 검사
       if (!validateCrawlingResponse(data)) {
-        throw new Error('업체 정보를 가져오는데 실패했습니다. 다시 시도해주세요.');
+        throw new Error(t('app.autocompleteError'));
       }
 
       setAnalysisData(data);
@@ -297,7 +299,7 @@ const App: React.FC = () => {
       setViewMode('analysis');
     } catch (err) {
       console.error('Autocomplete failed:', err);
-      const errorMessage = err instanceof Error ? err.message : '업체 정보 조회 중 오류가 발생했습니다. 다시 시도해주세요.';
+      const errorMessage = err instanceof Error ? err.message : t('app.autocompleteGeneralError');
       setError(errorMessage);
       setViewMode('landing');
     }
@@ -325,7 +327,7 @@ const App: React.FC = () => {
       window.location.href = response.auth_url;
     } catch (err) {
       console.error('Failed to get Kakao login URL:', err);
-      alert('로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.');
+      alert(t('app.loginUrlFailed'));
     }
   };
 
@@ -364,7 +366,7 @@ const App: React.FC = () => {
     return (
       <div className="login-container" style={{ display: 'flex', alignItems: 'center', justifyContent: 'center' }}>
         <div style={{ textAlign: 'center', color: '#fff' }}>
-          <p style={{ fontSize: '18px' }}>로그인 처리 중...</p>
+          <p style={{ fontSize: '18px' }}>{t('app.loginProcessing')}</p>
         </div>
       </div>
     );
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
index 875842f..93ea975 100644
--- a/src/components/Footer.tsx
+++ b/src/components/Footer.tsx
@@ -1,7 +1,9 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 const Footer: React.FC = () => {
+  const { t } = useTranslation();
   return (
     <footer className="landing-footer">
       <div className="footer-content">
@@ -10,11 +12,11 @@ const Footer: React.FC = () => {
           <p className="footer-copyright">Copyright ⓒ O2O Inc. All rights reserved</p>
         </div>
         <div className="footer-right">
-          <p className="footer-info">사업자 등록번호 : 620-87-00810 | 대표 : 안성민</p>
-          <p className="footer-info">본사 : 41593 대구광역시 북구 옥산로 111, 5층 유니콘랩 대구 A05호</p>
-          <p className="footer-info">연구소 : 13453 경기 성남시 수정구 금토로 32 (금토동) (주)KT 판교빌딩 504호~505호 (East)</p>
-          <p className="footer-info">전화 : 070-4260-8310 | 010-2755-6463</p>
-          <p className="footer-info">이메일 : o2oteam@o2o.kr</p>
+          <p className="footer-info">{t('footer.businessNumber')}</p>
+          <p className="footer-info">{t('footer.headquarters')}</p>
+          <p className="footer-info">{t('footer.researchCenter')}</p>
+          <p className="footer-info">{t('footer.phone')}</p>
+          <p className="footer-info">{t('footer.email')}</p>
         </div>
       </div>
     </footer>
diff --git a/src/components/Header.tsx b/src/components/Header.tsx
index 626c24a..f5ee1ef 100755
--- a/src/components/Header.tsx
+++ b/src/components/Header.tsx
@@ -1,12 +1,15 @@
 
 import React, { useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import { getKakaoLoginUrl, isLoggedIn } from '../utils/api';
+import LanguageSwitch from './LanguageSwitch';
 
 interface HeaderProps {
   onStartClick?: () => void;
 }
 
 const Header: React.FC<HeaderProps> = ({ onStartClick }) => {
+  const { t } = useTranslation();
   const [isLoading, setIsLoading] = useState(false);
   const loggedIn = isLoggedIn();
 
@@ -16,11 +19,10 @@ const Header: React.FC<HeaderProps> = ({ onStartClick }) => {
     setIsLoading(true);
     try {
       const response = await getKakaoLoginUrl();
-      // 카카오 로그인 페이지로 리다이렉트
       window.location.href = response.auth_url;
     } catch (err) {
       console.error('Failed to get Kakao login URL:', err);
-      alert('로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.');
+      alert(t('header.loginFailedAlert'));
       setIsLoading(false);
     }
   };
@@ -36,22 +38,25 @@ const Header: React.FC<HeaderProps> = ({ onStartClick }) => {
       <div className="header-logo">
         <img src="/assets/images/ado2-header-logo.svg" alt="ADO2" />
       </div>
-      {loggedIn ? (
-        <button
-          className="header-start-btn"
-          onClick={handleStart}
-        >
-          시작하기
-        </button>
-      ) : (
-        <button
-          className="header-login-btn"
-          onClick={handleLogin}
-          disabled={isLoading}
-        >
-          {isLoading ? '로딩...' : '로그인'}
-        </button>
-      )}
+      <div className="header-actions">
+        <LanguageSwitch />
+        {loggedIn ? (
+          <button
+            className="header-start-btn"
+            onClick={handleStart}
+          >
+            {t('header.start')}
+          </button>
+        ) : (
+          <button
+            className="header-login-btn"
+            onClick={handleLogin}
+            disabled={isLoading}
+          >
+            {isLoading ? t('header.loading') : t('header.login')}
+          </button>
+        )}
+      </div>
     </header>
   );
 };
diff --git a/src/components/LanguageSwitch.tsx b/src/components/LanguageSwitch.tsx
new file mode 100644
index 0000000..e41c9ba
--- /dev/null
+++ b/src/components/LanguageSwitch.tsx
@@ -0,0 +1,50 @@
+
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+
+interface LanguageSwitchProps {
+  isCollapsed?: boolean;
+}
+
+const LanguageSwitch: React.FC<LanguageSwitchProps> = ({ isCollapsed = false }) => {
+  const { i18n } = useTranslation();
+  const isEnglish = i18n.language === 'en';
+
+  const switchTo = (lang: string) => {
+    if (i18n.language !== lang) {
+      i18n.changeLanguage(lang);
+    }
+  };
+
+  if (isCollapsed) {
+    return (
+      <button
+        className="lang-toggle-collapsed"
+        onClick={() => switchTo(isEnglish ? 'ko' : 'en')}
+        title={isEnglish ? '한국어로 전환' : 'Switch to English'}
+      >
+        {isEnglish ? 'EN' : 'KO'}
+      </button>
+    );
+  }
+
+  return (
+    <div className="lang-toggle">
+      <button
+        className={`lang-toggle-option ${!isEnglish ? 'active' : ''}`}
+        onClick={() => switchTo('ko')}
+      >
+        KO
+      </button>
+      <button
+        className={`lang-toggle-option ${isEnglish ? 'active' : ''}`}
+        onClick={() => switchTo('en')}
+      >
+        EN
+      </button>
+      <div className={`lang-toggle-slider ${isEnglish ? 'right' : 'left'}`} />
+    </div>
+  );
+};
+
+export default LanguageSwitch;
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index d55cf4f..686e6a2 100755
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -1,7 +1,9 @@
 
 import React, { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { UserMeResponse } from '../types/api';
 import { logout } from '../utils/api';
+import LanguageSwitch from './LanguageSwitch';
 
 interface SidebarItemProps {
   icon: React.ReactNode;
@@ -36,6 +38,7 @@ interface SidebarProps {
 }
 
 const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userInfo, onLogout }) => {
+  const { t } = useTranslation();
   const [isCollapsed, setIsCollapsed] = useState(false);
   const [isMobileOpen, setIsMobileOpen] = useState(false);
   const [isLoggingOut, setIsLoggingOut] = useState(false);
@@ -76,11 +79,11 @@ const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userI
   };
 
   const menuItems = [
-    { id: '대시보드', label: '대시보드', disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="7" height="9"/><rect x="14" y="3" width="7" height="5"/><rect x="14" y="12" width="7" height="9"/><rect x="3" y="16" width="7" height="5"/></svg> },
-    { id: '새 프로젝트 만들기', label: '새 프로젝트 만들기', disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg> },
-    { id: 'ADO2 콘텐츠', label: 'ADO2 콘텐츠', disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"/></svg> },
-    { id: '내 콘텐츠', label: '내 콘텐츠', disabled: true, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg> },
-    { id: '내 정보', label: '내 정보', disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/></svg> },
+    { id: '대시보드', label: t('sidebar.dashboard'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="7" height="9"/><rect x="14" y="3" width="7" height="5"/><rect x="14" y="12" width="7" height="9"/><rect x="3" y="16" width="7" height="5"/></svg> },
+    { id: '새 프로젝트 만들기', label: t('sidebar.newProject'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg> },
+    { id: 'ADO2 콘텐츠', label: t('sidebar.ado2Contents'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z"/></svg> },
+    { id: '내 콘텐츠', label: t('sidebar.myContents'), disabled: true, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg> },
+    { id: '내 정보', label: t('sidebar.myInfo'), disabled: false, icon: <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5"><path d="M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2"/><circle cx="12" cy="7" r="4"/></svg> },
   ];
 
   return (
@@ -145,6 +148,10 @@ const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userI
         </div>
 
         <div className="sidebar-footer">
+          <div className="sidebar-language-switch">
+            <LanguageSwitch isCollapsed={isCollapsed} />
+          </div>
+
           <div className={`profile-section ${isCollapsed ? 'collapsed' : ''}`}>
             {userInfo?.profile_image_url || userInfo?.thumbnail_image_url ? (
               <img
@@ -162,7 +169,7 @@ const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userI
             )}
             {!isCollapsed && (
               <div className="flex-1 min-w-0">
-                <p className="profile-name">{userInfo?.nickname || '사용자'}</p>
+                <p className="profile-name">{userInfo?.nickname || t('sidebar.defaultUser')}</p>
               </div>
             )}
           </div>
@@ -175,7 +182,7 @@ const Sidebar: React.FC<SidebarProps> = ({ activeItem, onNavigate, onHome, userI
             <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
               <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/><polyline points="16 17 21 12 16 7"/><line x1="21" y1="12" x2="9" y2="12"/>
             </svg>
-            {!isCollapsed && <span className="logout-btn-label">{isLoggingOut ? '로그아웃 중...' : '로그아웃'}</span>}
+            {!isCollapsed && <span className="logout-btn-label">{isLoggingOut ? t('sidebar.loggingOut') : t('sidebar.logout')}</span>}
           </button>
         </div>
       </div>
diff --git a/src/components/SocialPostingModal.tsx b/src/components/SocialPostingModal.tsx
index 377663b..373f55b 100644
--- a/src/components/SocialPostingModal.tsx
+++ b/src/components/SocialPostingModal.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect, useRef } from 'react';
+import { useTranslation } from 'react-i18next';
 import { getSocialAccounts, uploadToSocial, waitForUploadComplete, TokenExpiredError, handleSocialReconnect } from '../utils/api';
 import { SocialAccount, VideoListItem, SocialUploadStatusResponse } from '../types/api';
 import UploadProgressModal, { UploadStatus } from './UploadProgressModal';
@@ -30,6 +31,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
   onClose,
   video
 }) => {
+  const { t } = useTranslation();
   const [socialAccounts, setSocialAccounts] = useState<SocialAccount[]>([]);
   const [selectedChannel, setSelectedChannel] = useState<string>('');
   const [title, setTitle] = useState('');
@@ -93,7 +95,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
       }
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('social.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
@@ -105,20 +107,20 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
 
   const handlePost = async () => {
     if (!selectedChannel || !title.trim() || !video) {
-      alert('채널과 제목을 입력해주세요.');
+      alert(t('social.channelAndTitleRequired'));
       return;
     }
 
     const selectedAcc = socialAccounts.find(acc => acc.platform_user_id === selectedChannel);
     if (!selectedAcc) {
-      alert('채널을 선택해주세요.');
+      alert(t('social.selectChannel'));
       return;
     }
 
     // video.video_id 검증 - 반드시 존재해야 함
     if (!video.video_id) {
       console.error('Video object missing video_id:', video);
-      alert('영상 정보가 올바르지 않습니다. (video_id 누락)');
+      alert(t('social.invalidVideoInfo'));
       return;
     }
 
@@ -157,7 +159,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
       const uploadResponse = await uploadToSocial(requestPayload);
 
       if (!uploadResponse.success) {
-        throw new Error(uploadResponse.message || '업로드 시작에 실패했습니다.');
+        throw new Error(uploadResponse.message || t('social.uploadStartFailed'));
       }
 
       // Poll for upload completion
@@ -180,13 +182,13 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
     } catch (error) {
       if (error instanceof TokenExpiredError) {
         setShowUploadProgress(false);
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('social.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
       console.error('Upload failed:', error);
       setUploadStatus('failed');
-      setUploadErrorMessage(error instanceof Error ? error.message : '업로드에 실패했습니다.');
+      setUploadErrorMessage(error instanceof Error ? error.message : t('social.uploadFailed'));
     } finally {
       setIsPosting(false);
     }
@@ -221,9 +223,9 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
   const selectedAccount = socialAccounts.find(acc => acc.platform_user_id === selectedChannel);
 
   const privacyOptions = [
-    { value: 'public', label: '공개' },
-    { value: 'unlisted', label: '미등록 (링크로만 접근)' },
-    { value: 'private', label: '비공개' }
+    { value: 'public', label: t('social.privacyPublic') },
+    { value: 'unlisted', label: t('social.privacyUnlisted') },
+    { value: 'private', label: t('social.privacyPrivate') }
   ];
 
   const selectedPrivacyOption = privacyOptions.find(opt => opt.value === privacy);
@@ -253,7 +255,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
       <div className="social-posting-modal" onClick={(e) => e.stopPropagation()}>
         {/* Header */}
         <div className="social-posting-header">
-          <h2 className="social-posting-title">소셜 미디어 포스팅</h2>
+          <h2 className="social-posting-title">{t('social.title')}</h2>
           <button className="social-posting-close" onClick={handleClose}>
             <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
               <line x1="18" y1="6" x2="6" y2="18"/>
@@ -280,7 +282,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
           <div className="social-posting-form">
             {/* Video Info */}
             <div className="social-posting-video-info">
-              <span className="social-posting-label-badge">게시물 1</span>
+              <span className="social-posting-label-badge">{t('social.postNumber')}</span>
               <span className="social-posting-add-btn">+</span>
             </div>
 
@@ -288,20 +290,20 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
               <p className="social-posting-video-title">
                 {video.store_name} {new Date(video.created_at).toLocaleString('ko-KR')}
               </p>
-              <p className="social-posting-video-specs">1080x1920 · 10초</p>
+              <p className="social-posting-video-specs">{t('social.videoSpecs')}</p>
             </div>
 
             {/* Channel Selector - Custom Dropdown */}
             <div className="social-posting-field">
               <label className="social-posting-label">
-                게시 채널 <span className="required">*</span>
+                {t('social.channelLabel')} <span className="required">*</span>
               </label>
               {isLoadingAccounts ? (
-                <div className="social-posting-loading">계정 로딩 중...</div>
+                <div className="social-posting-loading">{t('social.loadingAccounts')}</div>
               ) : socialAccounts.length === 0 ? (
                 <div className="social-posting-no-accounts">
-                  <p>연결된 소셜 계정이 없습니다.</p>
-                  <p className="social-posting-no-accounts-hint">내 정보에서 계정을 연결해주세요.</p>
+                  <p>{t('social.noAccounts')}</p>
+                  <p className="social-posting-no-accounts-hint">{t('social.noAccountsHint')}</p>
                 </div>
               ) : (
                 <div className="social-posting-channel-dropdown" ref={channelDropdownRef}>
@@ -355,13 +357,13 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
             {/* Title */}
             <div className="social-posting-field">
               <label className="social-posting-label">
-                게시물 제목 <span className="required">*</span>
+                {t('social.postTitleLabel')} <span className="required">*</span>
               </label>
               <input
                 type="text"
                 value={title}
                 onChange={(e) => setTitle(e.target.value)}
-                placeholder="게시물 제목을 입력하세요."
+                placeholder={t('social.postTitlePlaceholder')}
                 className="social-posting-input"
                 maxLength={100}
               />
@@ -370,11 +372,11 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
 
             {/* Description */}
             <div className="social-posting-field">
-              <label className="social-posting-label">게시물 내용</label>
+              <label className="social-posting-label">{t('social.postContentLabel')}</label>
               <textarea
                 value={description}
                 onChange={(e) => setDescription(e.target.value)}
-                placeholder="게시물 내용을 입력하세요."
+                placeholder={t('social.postContentPlaceholder')}
                 className="social-posting-textarea"
                 maxLength={5000}
                 rows={4}
@@ -384,12 +386,12 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
 
             {/* Tags */}
             <div className="social-posting-field">
-              <label className="social-posting-label">태그</label>
+              <label className="social-posting-label">{t('social.tagsLabel')}</label>
               <input
                 type="text"
                 value={tags}
                 onChange={(e) => setTags(e.target.value)}
-                placeholder="태그를 입력하세요. (쉼표로 구분)"
+                placeholder={t('social.tagsPlaceholder')}
                 className="social-posting-input"
                 maxLength={500}
               />
@@ -399,7 +401,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
             {/* Privacy - Custom Dropdown */}
             <div className="social-posting-field">
               <label className="social-posting-label">
-                게시물 공개 범위 <span className="required">*</span>
+                {t('social.privacyLabel')} <span className="required">*</span>
               </label>
               <div className="social-posting-channel-dropdown" ref={privacyDropdownRef}>
                 <button
@@ -437,7 +439,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
             {/* Publish Time */}
             <div className="social-posting-field">
               <label className="social-posting-label">
-                게시 시간 <span className="required">*</span>
+                {t('social.publishTimeLabel')} <span className="required">*</span>
               </label>
               <div className="social-posting-radio-group">
                 <label className="social-posting-radio">
@@ -448,7 +450,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
                     checked={publishTime === 'now'}
                     onChange={() => setPublishTime('now')}
                   />
-                  <span className="radio-label">지금 게시</span>
+                  <span className="radio-label">{t('social.publishNow')}</span>
                 </label>
                 <label className="social-posting-radio">
                   <input
@@ -459,7 +461,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
                     onChange={() => setPublishTime('schedule')}
                     disabled
                   />
-                  <span className="radio-label disabled">시간 설정 (준비 중)</span>
+                  <span className="radio-label disabled">{t('social.publishSchedule')}</span>
                 </label>
               </div>
             </div>
@@ -469,7 +471,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
         {/* Footer */}
         <div className="social-posting-footer">
           <p className="social-posting-footer-note">
-            게시는 <a href="#" className="social-posting-link">요금제 업그레이드</a> 후 가능합니다.
+            {t('social.footerNote', { link: '' })}<a href="#" className="social-posting-link">{t('social.footerNoteLink')}</a>
           </p>
           <div className="social-posting-actions">
             <button
@@ -477,14 +479,14 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
               onClick={handleClose}
               disabled={isPosting}
             >
-              취소
+              {t('social.cancel')}
             </button>
             <button
               className="social-posting-btn submit"
               onClick={handlePost}
               disabled={isPosting || socialAccounts.length === 0 || !title.trim()}
             >
-              {isPosting ? '게시 중...' : '게시'}
+              {isPosting ? t('social.posting') : t('social.post')}
             </button>
           </div>
         </div>
diff --git a/src/components/UploadProgressModal.tsx b/src/components/UploadProgressModal.tsx
index d55368a..d16403e 100644
--- a/src/components/UploadProgressModal.tsx
+++ b/src/components/UploadProgressModal.tsx
@@ -1,5 +1,6 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export type UploadStatus = 'pending' | 'uploading' | 'completed' | 'failed';
 
@@ -24,20 +25,21 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
   youtubeUrl,
   errorMessage,
 }) => {
+  const { t } = useTranslation();
   if (!isOpen) return null;
 
   const getStatusText = () => {
     switch (status) {
       case 'pending':
-        return '업로드 준비 중...';
+        return t('upload.statusPending');
       case 'uploading':
-        return '업로드 중...';
+        return t('upload.statusUploading');
       case 'completed':
-        return '업로드 완료!';
+        return t('upload.statusCompleted');
       case 'failed':
-        return '업로드 실패';
+        return t('upload.statusFailed');
       default:
-        return '처리 중...';
+        return t('upload.statusDefault');
     }
   };
 
@@ -81,7 +83,7 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
       <div className="upload-progress-modal">
         {/* Header */}
         <div className="upload-progress-header">
-          <h2 className="upload-progress-title">YouTube 업로드</h2>
+          <h2 className="upload-progress-title">{t('upload.title')}</h2>
           {canClose && (
             <button className="upload-progress-close" onClick={onClose}>
               <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
@@ -114,11 +116,11 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
           {/* Video Info */}
           <div className="upload-progress-info">
             <div className="upload-progress-info-row">
-              <span className="upload-progress-label">영상 제목</span>
+              <span className="upload-progress-label">{t('upload.videoTitleLabel')}</span>
               <span className="upload-progress-value">{videoTitle}</span>
             </div>
             <div className="upload-progress-info-row">
-              <span className="upload-progress-label">채널</span>
+              <span className="upload-progress-label">{t('upload.channelLabel')}</span>
               <span className="upload-progress-value">{channelName}</span>
             </div>
           </div>
@@ -139,7 +141,7 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
               className="upload-progress-youtube-link"
             >
               <img src="/assets/images/social-youtube.png" alt="YouTube" className="upload-youtube-icon" />
-              YouTube에서 보기
+              {t('upload.viewOnYoutube')}
             </a>
           )}
         </div>
@@ -148,10 +150,10 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
         <div className="upload-progress-footer">
           {canClose ? (
             <button className="upload-progress-btn primary" onClick={onClose}>
-              {status === 'completed' ? '확인' : '닫기'}
+              {status === 'completed' ? t('upload.confirm') : t('upload.close')}
             </button>
           ) : (
-            <p className="upload-progress-note">업로드가 진행 중입니다. 창을 닫지 마세요.</p>
+            <p className="upload-progress-note">{t('upload.doNotClose')}</p>
           )}
         </div>
       </div>
diff --git a/src/i18n/index.ts b/src/i18n/index.ts
new file mode 100644
index 0000000..e6ef0ae
--- /dev/null
+++ b/src/i18n/index.ts
@@ -0,0 +1,22 @@
+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
+import ko from '../locales/ko.json';
+import en from '../locales/en.json';
+
+const LANGUAGE_KEY = 'castad_language';
+
+i18n.use(initReactI18next).init({
+  resources: {
+    ko: { translation: ko },
+    en: { translation: en },
+  },
+  lng: localStorage.getItem(LANGUAGE_KEY) || 'ko',
+  fallbackLng: 'ko',
+  interpolation: { escapeValue: false },
+});
+
+i18n.on('languageChanged', (lng) => {
+  localStorage.setItem(LANGUAGE_KEY, lng);
+});
+
+export default i18n;
diff --git a/src/index.tsx b/src/index.tsx
index aaa0c6e..7152cf1 100755
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -1,6 +1,7 @@
 
 import React from 'react';
 import ReactDOM from 'react-dom/client';
+import './i18n';
 import App from './App';
 
 const rootElement = document.getElementById('root');
diff --git a/src/locales/en.json b/src/locales/en.json
new file mode 100644
index 0000000..14d24f5
--- /dev/null
+++ b/src/locales/en.json
@@ -0,0 +1,371 @@
+{
+  "header": {
+    "loginFailedAlert": "Failed to get login URL. Please try again.",
+    "start": "Get Started",
+    "loading": "Loading...",
+    "login": "Log In"
+  },
+  "sidebar": {
+    "dashboard": "Dashboard",
+    "newProject": "Create New Project",
+    "ado2Contents": "ADO2 Contents",
+    "myContents": "My Contents",
+    "myInfo": "My Info",
+    "defaultUser": "User",
+    "loggingOut": "Logging out...",
+    "logout": "Log Out"
+  },
+  "footer": {
+    "businessNumber": "Business Registration No. : 620-87-00810 | CEO : Ahn Sungmin",
+    "headquarters": "HQ : 41593 Unicorn Lab Daegu A05, 5F, 111 Oksan-ro, Buk-gu, Daegu, Korea",
+    "researchCenter": "R&D : 13453 Rooms 504-505 (East), KT Pangyo Bldg, 32 Geumto-ro, Sujeong-gu, Seongnam-si, Gyeonggi-do, Korea",
+    "phone": "Tel : 070-4260-8310 | 010-2755-6463",
+    "email": "Email : o2oteam@o2o.kr"
+  },
+  "social": {
+    "title": "Social Media Posting",
+    "postNumber": "Post 1",
+    "videoSpecs": "1080x1920 · 10 sec",
+    "channelLabel": "Post Channel",
+    "loadingAccounts": "Loading accounts...",
+    "noAccounts": "No connected social accounts.",
+    "noAccountsHint": "Please connect an account in My Info.",
+    "postTitleLabel": "Post Title",
+    "postTitlePlaceholder": "Enter a post title.",
+    "postContentLabel": "Post Content",
+    "postContentPlaceholder": "Enter post content.",
+    "tagsLabel": "Tags",
+    "tagsPlaceholder": "Enter tags. (separated by commas)",
+    "privacyLabel": "Post Visibility",
+    "privacyPublic": "Public",
+    "privacyUnlisted": "Unlisted (accessible by link only)",
+    "privacyPrivate": "Private",
+    "publishTimeLabel": "Publish Time",
+    "publishNow": "Publish Now",
+    "publishSchedule": "Schedule (Coming Soon)",
+    "footerNote": "Posting is available after {link}.",
+    "footerNoteLink": "plan upgrade",
+    "cancel": "Cancel",
+    "posting": "Posting...",
+    "post": "Post",
+    "youtubeExpiredAlert": "YouTube authentication has expired. Redirecting to reconnect page.",
+    "channelAndTitleRequired": "Please enter a channel and title.",
+    "selectChannel": "Please select a channel.",
+    "invalidVideoInfo": "Video information is invalid. (missing video_id)",
+    "uploadStartFailed": "Failed to start upload.",
+    "uploadFailed": "Upload failed."
+  },
+  "upload": {
+    "title": "YouTube Upload",
+    "statusPending": "Preparing upload...",
+    "statusUploading": "Uploading...",
+    "statusCompleted": "Upload complete!",
+    "statusFailed": "Upload failed",
+    "statusDefault": "Processing...",
+    "videoTitleLabel": "Video Title",
+    "channelLabel": "Channel",
+    "viewOnYoutube": "View on YouTube",
+    "confirm": "OK",
+    "close": "Close",
+    "doNotClose": "Upload is in progress. Do not close this window."
+  },
+  "landing": {
+    "hero": {
+      "searchTypeBusinessName": "Business Name",
+      "placeholderBusinessName": "Enter a business name",
+      "guideUrl": "A video will be automatically generated from the information gathered from the URL.",
+      "guideBusinessName": "Search by business name to retrieve information.",
+      "errorUrlRequired": "Please enter a URL.",
+      "errorNameRequired": "Please enter a business name.",
+      "errorInvalidUrl": "Invalid URL format. (e.g., https://example.com)",
+      "analyzeButton": "Brand Analysis",
+      "scrollMore": "Scroll to see more",
+      "testDataLoading": "Loading...",
+      "testData": "Test Data",
+      "testDataLoadFailed": "Failed to load test data.",
+      "searching": "Searching..."
+    },
+    "welcome": {
+      "title": "Welcome to ADO2.AI",
+      "subtitle": "Automate the entire content marketing process from analysis, creation, to distribution",
+      "feature1Title": "Business Core Information Analysis",
+      "feature1Desc": "Enter the URL of your homepage,\nNaver Map, blog, etc.",
+      "feature2Title": "Automated Promotional Content Creation",
+      "feature2Desc": "Based on analyzed information,\nautomatically create music, subtitles, songs,\nand videos tailored to your business",
+      "feature3Title": "Multi-Channel Auto Distribution",
+      "feature3Desc": "Completed videos can be downloaded\nor uploaded directly to social media"
+    },
+    "display": {
+      "startButton": "Get Started"
+    }
+  },
+  "login": {
+    "back": "Go Back",
+    "kakaoLoginFailed": "Kakao login failed. Please try again.",
+    "loginUrlFailed": "Failed to get login URL. Please try again.",
+    "loggingIn": "Logging in...",
+    "kakaoStart": "Start with Kakao"
+  },
+  "urlInput": {
+    "searchTypeBusinessName": "Business Name",
+    "placeholderBusinessName": "Enter a business name",
+    "guideUrl": "A video will be automatically generated from the information gathered from the URL.",
+    "guideBusinessName": "Search by business name to retrieve information.",
+    "searchButton": "Search",
+    "searching": "Searching...",
+    "testDataLoading": "Loading...",
+    "testData": "Test Data"
+  },
+  "assetManagement": {
+    "title": "Brand Assets",
+    "selectedImages": "Selected Images",
+    "imageAlt": "Image",
+    "uploadBadge": "Uploaded",
+    "imageUpload": "Image Upload",
+    "dragAndDrop": "Drag and drop\nimages to upload",
+    "videoRatio": "Video Ratio",
+    "uploadFailed": "Image upload failed.",
+    "uploading": "Uploading...",
+    "nextStep": "Next Step"
+  },
+  "soundStudio": {
+    "back": "Go Back",
+    "title": "Sound Studio",
+    "soundColumn": "Sound",
+    "soundTypeLabel": "Select AI Sound Type",
+    "soundTypeVocal": "Vocal",
+    "soundTypeBGM": "Background Music",
+    "soundTypeNarration": "Voice Narration",
+    "genreLabel": "Select Genre",
+    "genreAuto": "Auto Select",
+    "genreBallad": "Ballad",
+    "languageLabel": "Language",
+    "languageKorean": "Korean",
+    "lyricsColumn": "Lyrics",
+    "lyricsHint": "Select the lyrics area to edit",
+    "lyricsPlaceholder": "Lyrics will be displayed when sound is generated.",
+    "generateButton": "Generate Sound",
+    "generating": "Generating...",
+    "generateVideo": "Generate Video",
+    "videoGenerating": "Generating Video",
+    "noBusinessInfo": "No business information. Please try again.",
+    "noImageUploadInfo": "No image upload information. Please go back to the previous step and try again.",
+    "generatingLyrics": "Generating lyrics...",
+    "generatingSong": "Generating song...",
+    "songQueued": "Song generation queued...",
+    "retryMessage": "Regenerating due to timeout... ({{count}}/{{max}})",
+    "lyricGenerationFailed": "Lyrics generation request failed.",
+    "lyricNotReceived": "Lyrics were not received.",
+    "lyricGenerationError": "Lyrics generation failed. Please try again.",
+    "songGenerationFailed": "Music generation request failed.",
+    "songIdMissing": "song_id was not received from the server.",
+    "musicGenerationFailed": "Music generation failed.",
+    "multipleRetryFailed": "Music generation failed after multiple attempts. Please try again.",
+    "musicGenerationError": "An error occurred during music generation.",
+    "songRegenerationError": "An error occurred during music regeneration."
+  },
+  "completion": {
+    "back": "Go Back",
+    "titleGenerating": "Generating Video",
+    "titleError": "Video Generation Failed",
+    "titleComplete": "Content Creation Complete",
+    "imageAndVideo": "Images & Video",
+    "requestingGeneration": "Requesting video generation...",
+    "generatingVideo": "Generating video...",
+    "processingAfterRefresh": "Processing video... (recovered after refresh)",
+    "generationFailed": "Video generation request failed.",
+    "generationError": "An error occurred during video generation.",
+    "videoUrlMissing": "Video URL was not received.",
+    "generationTimeout": "Video generation timed out. Please try again.",
+    "retry": "Retry",
+    "statusPlanned": "Scheduled",
+    "statusWaiting": "Waiting",
+    "statusTranscribing": "Transcribing",
+    "statusRendering": "Rendering",
+    "statusSucceeded": "Completed",
+    "statusDefault": "Processing...",
+    "aiOptimization": "AI Optimization",
+    "aiTagColorCorrection": "Color Correction",
+    "aiTagDynamicSubtitle": "Dynamic Subtitles",
+    "aiTagBeatSync": "Beat Sync",
+    "aiTagSEOMeta": "SEO Meta Tags",
+    "sharing": "Share",
+    "connecting": "Connecting...",
+    "authenticated": "Verified",
+    "disconnect": "Disconnect",
+    "connectAccount": "Connect Account",
+    "comingSoon": "Coming Soon",
+    "youtubeConnectFailed": "Failed to connect YouTube.",
+    "disconnectFailed": "Failed to disconnect.",
+    "deployToSocial": "Deploy to Social Channel",
+    "downloadMp4": "Download MP4 File",
+    "selectSocialChannel": "Please select a social channel to deploy.",
+    "videoNotReady": "The video is not ready yet.",
+    "youtubeUploadMessage": "Uploading video to YouTube channel \"{{channelName}}\".\n\n(Upload feature coming soon)",
+    "deployComingSoon": "The deployment feature for the selected social channel is coming soon.",
+    "youtubeExpiredAlert": "YouTube authentication has expired. Redirecting to reconnect page."
+  },
+  "dashboard": {
+    "title": "Dashboard",
+    "description": "Check your real-time marketing performance.",
+    "lastUpdated": "Last updated:",
+    "contentPerformance": "Content Performance",
+    "metricImpressions": "Total Impressions",
+    "metricReach": "Reach",
+    "metricLikes": "Likes",
+    "metricComments": "Comments",
+    "metricShares": "Shares",
+    "metricSaves": "Saves",
+    "metricEngagement": "Engagement Rate",
+    "metricContent": "Content",
+    "yearOverYear": "Year-over-Year Growth",
+    "thisYear": "This Year",
+    "lastYear": "Last Year",
+    "popularContent": "Popular Content",
+    "audienceInsights": "Audience Insights",
+    "ageDistribution": "Age Distribution",
+    "genderDistribution": "Gender Distribution",
+    "male": "Male",
+    "female": "Female",
+    "topRegions": "Top Regions",
+    "platformMetrics": "Platform Metrics",
+    "months": {
+      "jan": "Jan",
+      "feb": "Feb",
+      "mar": "Mar",
+      "apr": "Apr",
+      "may": "May",
+      "jun": "Jun",
+      "jul": "Jul",
+      "aug": "Aug",
+      "sep": "Sep",
+      "oct": "Oct",
+      "nov": "Nov",
+      "dec": "Dec"
+    },
+    "youtubeMetrics": {
+      "views": "Views",
+      "watchTime": "Watch Time",
+      "watchTimeUnit": "hours",
+      "avgViewDuration": "Avg. View Duration",
+      "subscribers": "Subscribers",
+      "newSubscribers": "New Subscribers",
+      "engagement": "Engagement Rate",
+      "ctr": "Click-Through Rate (CTR)",
+      "revenue": "Estimated Revenue"
+    },
+    "instagramMetrics": {
+      "reach": "Reach",
+      "impressions": "Impressions",
+      "profileVisits": "Profile Visits",
+      "followers": "Followers",
+      "newFollowers": "New Followers",
+      "storyViews": "Story Views",
+      "reelPlays": "Reel Plays",
+      "websiteClicks": "Website Clicks"
+    },
+    "regions": {
+      "seoul": "Seoul",
+      "gyeonggi": "Gyeonggi",
+      "busan": "Busan",
+      "incheon": "Incheon",
+      "daegu": "Daegu"
+    },
+    "topContentTitles": {
+      "winterPromotion": "Winter Pension Promotion Video",
+      "stayIntroReel": "Stay Meomum Introduction Reel",
+      "newYearEvent": "New Year Special Event",
+      "nightTimelapse": "Pension Night View Timelapse"
+    }
+  },
+  "myInfo": {
+    "title": "My Info",
+    "tabBasic": "Basic Info",
+    "tabPayment": "Payment Info",
+    "tabBusiness": "My Business & Social Channel Management",
+    "basicPlaceholder": "Basic information settings are coming soon.",
+    "paymentPlaceholder": "Payment information settings are coming soon.",
+    "myBusiness": "My Business",
+    "noBusinessTitle": "No registered business yet",
+    "noBusinessDesc": "Enter a Naver Map URL to automatically import the information needed for video production",
+    "naverMapUrlPlaceholder": "Enter Naver Map URL",
+    "registerBusiness": "Register Business",
+    "socialChannels": "Social Channels",
+    "youtubeConnecting": "Connecting...",
+    "youtubeConnect": "Connect YouTube",
+    "instagramConnect": "Connect Instagram",
+    "connected": "Connected",
+    "disconnectAccount": "Disconnect",
+    "loadingAccounts": "Loading account information...",
+    "youtubeExpiredAlert": "YouTube authentication has expired. Redirecting to reconnect page."
+  },
+  "ado2Contents": {
+    "title": "ADO2 Contents",
+    "totalCount": "Total {{count}}",
+    "loading": "Loading contents...",
+    "loadFailed": "Failed to load contents.",
+    "retry": "Retry",
+    "noContent": "No content created yet.",
+    "download": "Download",
+    "downloadFailed": "Download failed.",
+    "deleteFailed": "Deletion failed.",
+    "deleteConfirmTitle": "Are you sure you want to delete this content?",
+    "deleteConfirmDesc": "Deleted files cannot be recovered.",
+    "cancel": "Cancel",
+    "deleting": "Deleting...",
+    "delete": "Delete",
+    "previous": "Previous",
+    "next": "Next",
+    "uploadToSocial": "Upload to social media"
+  },
+  "businessSettings": {
+    "title": "Business Settings",
+    "description": "Set up your pension information and YouTube channel to enable automatic uploads",
+    "sharing": "Share",
+    "connect": "Connect"
+  },
+  "analysis": {
+    "back": "Go Back",
+    "pageTitle": "Brand Intelligence",
+    "pageDescHighlight": "AI Data Analysis",
+    "defaultBrandName": "Brand",
+    "brandIdentity": "Brand Identity",
+    "brandNameFallback": "Brand Name",
+    "addressFallback": "No address information",
+    "locationAnalysis": "Location Feature Analysis",
+    "conceptScalability": "Concept Scalability",
+    "noInfo": "No information",
+    "marketPositioning": "Market Positioning",
+    "coreValue": "Core Value",
+    "categoryDefinition": "Category Definition",
+    "targetPersona": "Target Persona",
+    "ageSuffix": "years old",
+    "sellingPoints": "Unique Selling Points (USP)",
+    "recommendedKeywords": "Recommended Target Keywords",
+    "generateContent": "Generate Content",
+    "pageDescBefore": " reveals ",
+    "pageDescAfter": "'s core strategy.",
+    "loadingTitle": "Analyzing Brand"
+  },
+  "common": {
+    "back": "Go Back",
+    "cancel": "Cancel",
+    "confirm": "OK",
+    "close": "Close",
+    "retry": "Retry",
+    "loading": "Loading...",
+    "required": "*",
+    "unknown": "Unknown"
+  },
+  "app": {
+    "loginProcessing": "Processing login...",
+    "loginFailed": "Login processing failed. Please try again.",
+    "kakaoLoginFailed": "Kakao login failed. Please try again.",
+    "loginUrlFailed": "Failed to get login URL. Please try again.",
+    "invalidUrl": "Invalid URL. Please enter a Naver Map URL.",
+    "analysisError": "An error occurred during analysis. Please try again.",
+    "autocompleteError": "Failed to retrieve business information.",
+    "autocompleteGeneralError": "An error occurred while retrieving business information. Please try again.",
+    "pageComingSoon": "{{page}} page is coming soon."
+  }
+}
diff --git a/src/locales/ko.json b/src/locales/ko.json
new file mode 100644
index 0000000..174b479
--- /dev/null
+++ b/src/locales/ko.json
@@ -0,0 +1,371 @@
+{
+  "header": {
+    "loginFailedAlert": "로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.",
+    "start": "시작하기",
+    "loading": "로딩...",
+    "login": "로그인"
+  },
+  "sidebar": {
+    "dashboard": "대시보드",
+    "newProject": "새 프로젝트 만들기",
+    "ado2Contents": "ADO2 콘텐츠",
+    "myContents": "내 콘텐츠",
+    "myInfo": "내 정보",
+    "defaultUser": "사용자",
+    "loggingOut": "로그아웃 중...",
+    "logout": "로그아웃"
+  },
+  "footer": {
+    "businessNumber": "사업자 등록번호 : 620-87-00810 | 대표 : 안성민",
+    "headquarters": "본사 : 41593 대구광역시 북구 옥산로 111, 5층 유니콘랩 대구 A05호",
+    "researchCenter": "연구소 : 13453 경기 성남시 수정구 금토로 32 (금토동) (주)KT 판교빌딩 504호~505호 (East)",
+    "phone": "전화 : 070-4260-8310 | 010-2755-6463",
+    "email": "이메일 : o2oteam@o2o.kr"
+  },
+  "social": {
+    "title": "소셜 미디어 포스팅",
+    "postNumber": "게시물 1",
+    "videoSpecs": "1080x1920 · 10초",
+    "channelLabel": "게시 채널",
+    "loadingAccounts": "계정 로딩 중...",
+    "noAccounts": "연결된 소셜 계정이 없습니다.",
+    "noAccountsHint": "내 정보에서 계정을 연결해주세요.",
+    "postTitleLabel": "게시물 제목",
+    "postTitlePlaceholder": "게시물 제목을 입력하세요.",
+    "postContentLabel": "게시물 내용",
+    "postContentPlaceholder": "게시물 내용을 입력하세요.",
+    "tagsLabel": "태그",
+    "tagsPlaceholder": "태그를 입력하세요. (쉼표로 구분)",
+    "privacyLabel": "게시물 공개 범위",
+    "privacyPublic": "공개",
+    "privacyUnlisted": "미등록 (링크로만 접근)",
+    "privacyPrivate": "비공개",
+    "publishTimeLabel": "게시 시간",
+    "publishNow": "지금 게시",
+    "publishSchedule": "시간 설정 (준비 중)",
+    "footerNote": "게시는 {link} 후 가능합니다.",
+    "footerNoteLink": "요금제 업그레이드",
+    "cancel": "취소",
+    "posting": "게시 중...",
+    "post": "게시",
+    "youtubeExpiredAlert": "YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.",
+    "channelAndTitleRequired": "채널과 제목을 입력해주세요.",
+    "selectChannel": "채널을 선택해주세요.",
+    "invalidVideoInfo": "영상 정보가 올바르지 않습니다. (video_id 누락)",
+    "uploadStartFailed": "업로드 시작에 실패했습니다.",
+    "uploadFailed": "업로드에 실패했습니다."
+  },
+  "upload": {
+    "title": "YouTube 업로드",
+    "statusPending": "업로드 준비 중...",
+    "statusUploading": "업로드 중...",
+    "statusCompleted": "업로드 완료!",
+    "statusFailed": "업로드 실패",
+    "statusDefault": "처리 중...",
+    "videoTitleLabel": "영상 제목",
+    "channelLabel": "채널",
+    "viewOnYoutube": "YouTube에서 보기",
+    "confirm": "확인",
+    "close": "닫기",
+    "doNotClose": "업로드가 진행 중입니다. 창을 닫지 마세요."
+  },
+  "landing": {
+    "hero": {
+      "searchTypeBusinessName": "업체명",
+      "placeholderBusinessName": "업체명을 입력하세요",
+      "guideUrl": "URL에서 가져온 정보로 영상이 자동 생성됩니다.",
+      "guideBusinessName": "업체명으로 검색하여 정보를 가져옵니다.",
+      "errorUrlRequired": "URL을 입력해주세요.",
+      "errorNameRequired": "업체명을 입력해주세요.",
+      "errorInvalidUrl": "올바른 URL 형식이 아닙니다. (예: https://example.com)",
+      "analyzeButton": "브랜드 분석",
+      "scrollMore": "스크롤하여 더 보기",
+      "testDataLoading": "로딩 중...",
+      "testData": "테스트 데이터",
+      "testDataLoadFailed": "테스트 데이터를 불러오는데 실패했습니다.",
+      "searching": "검색 중..."
+    },
+    "welcome": {
+      "title": "ADO2.AI에 오신 것을 환영합니다.",
+      "subtitle": "분석, 제작, 배포까지 콘텐츠 마케팅의 전과정을 자동화",
+      "feature1Title": "비즈니스 핵심 정보 분석",
+      "feature1Desc": "홈페이지, 네이버 지도, 블로그 등의\nURL을 입력하세요",
+      "feature2Title": "홍보 콘텐츠 자동 제작",
+      "feature2Desc": "분석된 정보를 바탕으로\n비즈니스에 맞는 음악, 자막, 노래, 영상을\n자동으로 제작해요",
+      "feature3Title": "멀티채널 자동 배포",
+      "feature3Desc": "완성된 영상은 다운로드하거나\n바로 SNS에 업로드 할 수 있어요"
+    },
+    "display": {
+      "startButton": "시작하기"
+    }
+  },
+  "login": {
+    "back": "뒤로가기",
+    "kakaoLoginFailed": "카카오 로그인에 실패했습니다. 다시 시도해주세요.",
+    "loginUrlFailed": "로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.",
+    "loggingIn": "로그인 중...",
+    "kakaoStart": "카카오로 시작하기"
+  },
+  "urlInput": {
+    "searchTypeBusinessName": "업체명",
+    "placeholderBusinessName": "업체명을 입력하세요",
+    "guideUrl": "URL에서 가져온 정보로 영상이 자동 생성됩니다.",
+    "guideBusinessName": "업체명으로 검색하여 정보를 가져옵니다.",
+    "searchButton": "검색하기",
+    "searching": "검색 중...",
+    "testDataLoading": "로딩 중...",
+    "testData": "테스트 데이터"
+  },
+  "assetManagement": {
+    "title": "브랜드 에셋",
+    "selectedImages": "선택된 이미지",
+    "imageAlt": "이미지",
+    "uploadBadge": "업로드",
+    "imageUpload": "이미지 업로드",
+    "dragAndDrop": "이미지를 드래그하여\n업로드",
+    "videoRatio": "영상 비율",
+    "uploadFailed": "이미지 업로드에 실패했습니다.",
+    "uploading": "업로드 중...",
+    "nextStep": "다음 단계"
+  },
+  "soundStudio": {
+    "back": "뒤로가기",
+    "title": "사운드 스튜디오",
+    "soundColumn": "사운드",
+    "soundTypeLabel": "AI 사운드 유형 선택",
+    "soundTypeVocal": "보컬",
+    "soundTypeBGM": "배경음악",
+    "soundTypeNarration": "성우 내레이션",
+    "genreLabel": "장르 선택",
+    "genreAuto": "자동 선택",
+    "genreBallad": "발라드",
+    "languageLabel": "언어",
+    "languageKorean": "한국어",
+    "lyricsColumn": "가사",
+    "lyricsHint": "가사 영역을 선택해서 수정 가능해요",
+    "lyricsPlaceholder": "사운드 생성 시 가사 표시됩니다.",
+    "generateButton": "사운드 생성",
+    "generating": "생성 중...",
+    "generateVideo": "영상 생성하기",
+    "videoGenerating": "영상 생성 중",
+    "noBusinessInfo": "비즈니스 정보가 없습니다. 다시 시도해주세요.",
+    "noImageUploadInfo": "이미지 업로드 정보가 없습니다. 이전 단계로 돌아가 다시 시도해주세요.",
+    "generatingLyrics": "가사를 생성하고 있습니다...",
+    "generatingSong": "노래를 생성하고 있습니다...",
+    "songQueued": "노래 생성 대기 중...",
+    "retryMessage": "시간 초과로 재생성 중... ({{count}}/{{max}})",
+    "lyricGenerationFailed": "가사 생성 요청에 실패했습니다.",
+    "lyricNotReceived": "가사를 받지 못했습니다.",
+    "lyricGenerationError": "가사 생성에 실패했습니다. 다시 시도해주세요.",
+    "songGenerationFailed": "음악 생성 요청에 실패했습니다.",
+    "songIdMissing": "서버에서 song_id를 받지 못했습니다.",
+    "musicGenerationFailed": "음악 생성에 실패했습니다.",
+    "multipleRetryFailed": "여러 번 시도했지만 음악 생성에 실패했습니다. 다시 시도해주세요.",
+    "musicGenerationError": "음악 생성 중 오류가 발생했습니다.",
+    "songRegenerationError": "음악 재생성 중 오류가 발생했습니다."
+  },
+  "completion": {
+    "back": "뒤로가기",
+    "titleGenerating": "영상 생성 중",
+    "titleError": "영상 생성 실패",
+    "titleComplete": "콘텐츠 제작 완료",
+    "imageAndVideo": "이미지 및 영상",
+    "requestingGeneration": "영상 생성을 요청하고 있습니다...",
+    "generatingVideo": "영상을 생성하고 있습니다...",
+    "processingAfterRefresh": "영상을 처리하고 있습니다... (새로고침 후 복구됨)",
+    "generationFailed": "영상 생성 요청에 실패했습니다.",
+    "generationError": "영상 생성 중 오류가 발생했습니다.",
+    "videoUrlMissing": "영상 URL을 받지 못했습니다.",
+    "generationTimeout": "영상 생성 시간이 초과되었습니다. 다시 시도해주세요.",
+    "retry": "다시 시도",
+    "statusPlanned": "예약됨",
+    "statusWaiting": "대기 중",
+    "statusTranscribing": "트랜스크립션 중",
+    "statusRendering": "렌더링 중",
+    "statusSucceeded": "완료",
+    "statusDefault": "처리 중...",
+    "aiOptimization": "AI 최적화",
+    "aiTagColorCorrection": "색상 보정",
+    "aiTagDynamicSubtitle": "다이나믹 자막",
+    "aiTagBeatSync": "비트 싱크",
+    "aiTagSEOMeta": "SEO 메타 태그",
+    "sharing": "공유",
+    "connecting": "연결 중...",
+    "authenticated": "인증됨",
+    "disconnect": "해제",
+    "connectAccount": "계정 연결",
+    "comingSoon": "준비 중",
+    "youtubeConnectFailed": "YouTube 연결에 실패했습니다.",
+    "disconnectFailed": "연결 해제에 실패했습니다.",
+    "deployToSocial": "소셜 채널에 배포",
+    "downloadMp4": "MP4 파일 다운로드",
+    "selectSocialChannel": "배포할 소셜 채널을 선택해주세요.",
+    "videoNotReady": "영상이 아직 준비되지 않았습니다.",
+    "youtubeUploadMessage": "YouTube 채널 \"{{channelName}}\"에 영상을 업로드합니다.\n\n(업로드 기능 준비 중)",
+    "deployComingSoon": "선택한 소셜 채널에 배포 기능이 준비 중입니다.",
+    "youtubeExpiredAlert": "YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다."
+  },
+  "dashboard": {
+    "title": "대시보드",
+    "description": "실시간 마케팅 퍼포먼스를 확인하세요.",
+    "lastUpdated": "마지막 업데이트:",
+    "contentPerformance": "콘텐츠 성과",
+    "metricImpressions": "총 노출수",
+    "metricReach": "도달",
+    "metricLikes": "좋아요",
+    "metricComments": "댓글",
+    "metricShares": "공유",
+    "metricSaves": "저장",
+    "metricEngagement": "참여율",
+    "metricContent": "콘텐츠",
+    "yearOverYear": "전년 대비 성장",
+    "thisYear": "올해",
+    "lastYear": "작년",
+    "popularContent": "인기 콘텐츠",
+    "audienceInsights": "오디언스 인사이트",
+    "ageDistribution": "연령대 분포",
+    "genderDistribution": "성별 분포",
+    "male": "남성",
+    "female": "여성",
+    "topRegions": "상위 지역",
+    "platformMetrics": "플랫폼별 지표",
+    "months": {
+      "jan": "1월",
+      "feb": "2월",
+      "mar": "3월",
+      "apr": "4월",
+      "may": "5월",
+      "jun": "6월",
+      "jul": "7월",
+      "aug": "8월",
+      "sep": "9월",
+      "oct": "10월",
+      "nov": "11월",
+      "dec": "12월"
+    },
+    "youtubeMetrics": {
+      "views": "조회수",
+      "watchTime": "시청 시간",
+      "watchTimeUnit": "시간",
+      "avgViewDuration": "평균 시청 시간",
+      "subscribers": "구독자",
+      "newSubscribers": "신규 구독자",
+      "engagement": "참여율",
+      "ctr": "클릭률 (CTR)",
+      "revenue": "예상 수익"
+    },
+    "instagramMetrics": {
+      "reach": "도달",
+      "impressions": "노출",
+      "profileVisits": "프로필 방문",
+      "followers": "팔로워",
+      "newFollowers": "신규 팔로워",
+      "storyViews": "스토리 조회",
+      "reelPlays": "릴스 재생",
+      "websiteClicks": "웹사이트 클릭"
+    },
+    "regions": {
+      "seoul": "서울",
+      "gyeonggi": "경기",
+      "busan": "부산",
+      "incheon": "인천",
+      "daegu": "대구"
+    },
+    "topContentTitles": {
+      "winterPromotion": "겨울 펜션 프로모션 영상",
+      "stayIntroReel": "스테이 머뭄 소개 릴스",
+      "newYearEvent": "신년 특가 이벤트 안내",
+      "nightTimelapse": "펜션 야경 타임랩스"
+    }
+  },
+  "myInfo": {
+    "title": "내 정보",
+    "tabBasic": "기본 정보",
+    "tabPayment": "결제 정보",
+    "tabBusiness": "내 비즈니스 & 소셜 채널 관리",
+    "basicPlaceholder": "기본 정보 설정 기능이 준비 중입니다.",
+    "paymentPlaceholder": "결제 정보 설정 기능이 준비 중입니다.",
+    "myBusiness": "내 비즈니스",
+    "noBusinessTitle": "아직 등록된 비즈니스가 없어요",
+    "noBusinessDesc": "네이버 지도 URL을 입력하면, 영상 제작에 필요한 정보를 자동으로 불러와요",
+    "naverMapUrlPlaceholder": "네이버 지도 URL 입력",
+    "registerBusiness": "비즈니스 등록",
+    "socialChannels": "소셜 채널",
+    "youtubeConnecting": "연결 중...",
+    "youtubeConnect": "YouTube 연결",
+    "instagramConnect": "Instagram 연결",
+    "connected": "연결됨",
+    "disconnectAccount": "연결 해제",
+    "loadingAccounts": "계정 정보를 불러오는 중...",
+    "youtubeExpiredAlert": "YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다."
+  },
+  "ado2Contents": {
+    "title": "ADO2 콘텐츠",
+    "totalCount": "총 {{count}}개",
+    "loading": "콘텐츠를 불러오는 중...",
+    "loadFailed": "콘텐츠를 불러오는데 실패했습니다.",
+    "retry": "다시 시도",
+    "noContent": "생성된 콘텐츠가 없습니다.",
+    "download": "다운로드",
+    "downloadFailed": "다운로드에 실패했습니다.",
+    "deleteFailed": "삭제에 실패했습니다.",
+    "deleteConfirmTitle": "정말 콘텐츠를 삭제할까요?",
+    "deleteConfirmDesc": "삭제한 파일은 복구할 수 없어요.",
+    "cancel": "취소",
+    "deleting": "삭제 중...",
+    "delete": "삭제",
+    "previous": "이전",
+    "next": "다음",
+    "uploadToSocial": "소셜 미디어에 업로드"
+  },
+  "businessSettings": {
+    "title": "비즈니스 설정",
+    "description": "펜션 정보와 YouTube 채널을 설정하여 자동 업로드를 활성화하세요",
+    "sharing": "공유",
+    "connect": "연결하기"
+  },
+  "analysis": {
+    "back": "뒤로가기",
+    "pageTitle": "브랜드 인텔리전스",
+    "pageDescHighlight": "AI 데이터 분석",
+    "defaultBrandName": "브랜드",
+    "brandIdentity": "브랜드 정체성",
+    "brandNameFallback": "브랜드명",
+    "addressFallback": "주소 정보 없음",
+    "locationAnalysis": "입지 특성 분석",
+    "conceptScalability": "컨셉 확장성",
+    "noInfo": "정보 없음",
+    "marketPositioning": "시장 포지셔닝",
+    "coreValue": "핵심 가치 (Core Value)",
+    "categoryDefinition": "카테고리 정의",
+    "targetPersona": "타겟 페르소나",
+    "ageSuffix": "세",
+    "sellingPoints": "주요 셀링 포인트 (USP)",
+    "recommendedKeywords": "추천 타겟 키워드",
+    "generateContent": "콘텐츠 생성",
+    "pageDescBefore": "을 통해 도출된 ",
+    "pageDescAfter": "의 핵심 전략입니다.",
+    "loadingTitle": "브랜드 분석 중"
+  },
+  "common": {
+    "back": "뒤로가기",
+    "cancel": "취소",
+    "confirm": "확인",
+    "close": "닫기",
+    "retry": "다시 시도",
+    "loading": "로딩...",
+    "required": "*",
+    "unknown": "알 수 없음"
+  },
+  "app": {
+    "loginProcessing": "로그인 처리 중...",
+    "loginFailed": "로그인 처리에 실패했습니다. 다시 시도해주세요.",
+    "kakaoLoginFailed": "카카오 로그인에 실패했습니다. 다시 시도해주세요.",
+    "loginUrlFailed": "로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.",
+    "invalidUrl": "유효하지 않은 URL입니다. 네이버 지도 URL을 입력해주세요.",
+    "analysisError": "분석 중 오류가 발생했습니다. 다시 시도해주세요.",
+    "autocompleteError": "업체 정보 조회에 실패했습니다.",
+    "autocompleteGeneralError": "업체 정보 조회 중 오류가 발생했습니다. 다시 시도해주세요.",
+    "pageComingSoon": "{{page}} 페이지 준비 중입니다."
+  }
+}
diff --git a/src/pages/Analysis/AnalysisResultSection.tsx b/src/pages/Analysis/AnalysisResultSection.tsx
index 8ea0070..74fe2ff 100755
--- a/src/pages/Analysis/AnalysisResultSection.tsx
+++ b/src/pages/Analysis/AnalysisResultSection.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect, useRef } from 'react';
+import { useTranslation } from 'react-i18next';
 import { CrawlingResponse, TargetPersona, SellingPoint } from '../../types/api';
 
 interface AnalysisResultSectionProps {
@@ -276,6 +277,7 @@ const RadarChart: React.FC<RadarChartProps> = ({ data, size = 280 }) => {
 };
 
 const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, onGenerate, data }) => {
+  const { t } = useTranslation();
   const { processed_info, marketing_analysis } = data;
   const containerRef = useRef<HTMLDivElement>(null);
   const [buttonPosition, setButtonPosition] = useState({ left: 0, width: 0 });
@@ -318,7 +320,7 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
             <path d="M15 18l-6-6 6-6" />
           </svg>
-          <span>뒤로가기</span>
+          <span>{t('analysis.back')}</span>
         </button>
       </div>
 
@@ -327,9 +329,9 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
         <div className="bi-page-icon">
           <img src="/assets/images/star-icon.svg" alt="Star" className="bi-star-icon" />
         </div>
-        <h1 className="bi-page-title">브랜드 인텔리전스</h1>
+        <h1 className="bi-page-title">{t('analysis.pageTitle')}</h1>
         <p className="bi-page-desc">
-          <span className="highlight">AI 데이터 분석</span>을 통해 도출된 {processed_info?.customer_name || '브랜드'}의 핵심 전략입니다.
+          <span className="highlight">{t('analysis.pageDescHighlight')}</span>{t('analysis.pageDescBefore')}{processed_info?.customer_name || t('analysis.defaultBrandName')}{t('analysis.pageDescAfter')}
         </p>
       </div>
 
@@ -342,27 +344,27 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
             <div className="absolute top-0 left-0 w-1.5 h-full bg-gradient-to-b from-[#2dd4bf] to-[#AE72F9]"></div>
 
             <div className="bi-section-label mb-4">
-              브랜드 정체성
+              {t('analysis.brandIdentity')}
             </div>
 
-            <h2 className="bi-brand-name">{processed_info?.customer_name || '브랜드명'}</h2>
+            <h2 className="bi-brand-name">{processed_info?.customer_name || t('analysis.brandNameFallback')}</h2>
 
             <div className="bi-location mb-6">
               <MapPinIcon />
               <div>
-                <p>{processed_info?.detail_region_info || '주소 정보 없음'}</p>
+                <p>{processed_info?.detail_region_info || t('analysis.addressFallback')}</p>
                 <p style={{ opacity: 0.7, marginTop: '4px' }}>{processed_info?.region || ''}</p>
               </div>
             </div>
 
             <div className="space-y-6 border-t border-white/5 pt-6">
               <AnimatedItem index={0} baseDelay={100}>
-                <div className="bi-subsection-title">입지 특성 분석</div>
-                <p className="bi-body-text">{brandIdentity?.location_feature_analysis || '정보 없음'}</p>
+                <div className="bi-subsection-title">{t('analysis.locationAnalysis')}</div>
+                <p className="bi-body-text">{brandIdentity?.location_feature_analysis || t('analysis.noInfo')}</p>
               </AnimatedItem>
               <AnimatedItem index={1} baseDelay={100}>
-                <div className="bi-subsection-title">컨셉 확장성</div>
-                <p className="bi-body-text">{brandIdentity?.concept_scalability || '정보 없음'}</p>
+                <div className="bi-subsection-title">{t('analysis.conceptScalability')}</div>
+                <p className="bi-body-text">{brandIdentity?.concept_scalability || t('analysis.noInfo')}</p>
               </AnimatedItem>
             </div>
           </div>
@@ -370,20 +372,20 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
           {/* 시장 포지셔닝 카드 */}
           <div className="bi-card">
             <h3 className="bi-card-title">
-              시장 포지셔닝
+              {t('analysis.marketPositioning')}
             </h3>
 
             <div className="space-y-4">
               <AnimatedItem index={0} baseDelay={200}>
                 <div className="bi-inner-box bi-inner-box-accent">
-                  <div className="bi-subsection-title">핵심 가치 (Core Value)</div>
-                  <div className="bi-value">{marketPositioning?.core_value || '정보 없음'}</div>
+                  <div className="bi-subsection-title">{t('analysis.coreValue')}</div>
+                  <div className="bi-value">{marketPositioning?.core_value || t('analysis.noInfo')}</div>
                 </div>
               </AnimatedItem>
               <AnimatedItem index={1} baseDelay={200}>
                 <div className="bi-inner-box">
-                  <div className="bi-subsection-title" style={{ color: '#6AB0B3' }}>카테고리 정의</div>
-                  <div className="bi-value">{marketPositioning?.category_definition || '정보 없음'}</div>
+                  <div className="bi-subsection-title" style={{ color: '#6AB0B3' }}>{t('analysis.categoryDefinition')}</div>
+                  <div className="bi-value">{marketPositioning?.category_definition || t('analysis.noInfo')}</div>
                 </div>
               </AnimatedItem>
             </div>
@@ -392,16 +394,16 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
           {/* 타겟 페르소나 카드 */}
           <div className="bi-card">
             <h3 className="bi-card-title">
-              타겟 페르소나
+              {t('analysis.targetPersona')}
             </h3>
             <div className="space-y-4">
-              {targetPersonas.length === 0 && <p className="bi-body-text" style={{ color: '#6AB0B3' }}>정보 없음</p>}
+              {targetPersonas.length === 0 && <p className="bi-body-text" style={{ color: '#6AB0B3' }}>{t('analysis.noInfo')}</p>}
               {targetPersonas.map((persona: TargetPersona, idx: number) => (
                 <AnimatedItem key={idx} index={idx} baseDelay={300}>
                   <div className="bi-inner-box">
                     <div className="mb-4">
                       <div className="bi-persona-name">{persona.persona}</div>
-                      <div className="bi-persona-age">{persona.age.min_age}~{persona.age.max_age}세</div>
+                      <div className="bi-persona-age">{persona.age.min_age}~{persona.age.max_age}{t('analysis.ageSuffix')}</div>
                     </div>
 
                     {persona.favor_target.length > 0 && (
@@ -429,7 +431,7 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
           {/* 주요 셀링 포인트 카드 */}
           <div className="bi-card min-h-[500px] flex flex-col">
             <h3 className="bi-card-title mb-6">
-              주요 셀링 포인트 (USP)
+              {t('analysis.sellingPoints')}
             </h3>
 
             {/* 레이더 차트 */}
@@ -450,7 +452,7 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
 
             {/* 나머지 USP 리스트 */}
             <div className="space-y-4 flex-1">
-              {sellingPoints.length === 0 && <p className="bi-body-text" style={{ color: '#6AB0B3' }}>정보 없음</p>}
+              {sellingPoints.length === 0 && <p className="bi-body-text" style={{ color: '#6AB0B3' }}>{t('analysis.noInfo')}</p>}
               {sellingPoints
                 .filter((usp: SellingPoint) => usp.english_category !== topUSP?.english_category)
                 .map((usp: SellingPoint, idx: number) => (
@@ -469,9 +471,9 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
       {/* 추천 타겟 키워드 */}
       <div className="max-w-[1440px] mx-auto px-4 md:px-8 mt-10">
         <div className="bi-card">
-          <h3 className="bi-card-title">추천 타겟 키워드</h3>
+          <h3 className="bi-card-title">{t('analysis.recommendedKeywords')}</h3>
           <div className="flex flex-wrap gap-3">
-            {targetKeywords.length === 0 && <span className="bi-body-text" style={{ color: '#6AB0B3' }}>정보 없음</span>}
+            {targetKeywords.length === 0 && <span className="bi-body-text" style={{ color: '#6AB0B3' }}>{t('analysis.noInfo')}</span>}
             {targetKeywords.map((keyword: string, idx: number) => (
               <span key={idx} className="bi-tag-outline"># {keyword}</span>
             ))}
@@ -489,7 +491,7 @@ const AnalysisResultSection: React.FC<AnalysisResultSectionProps> = ({ onBack, o
           className="pointer-events-auto bg-brand-purple hover:bg-brand-purpleHover text-white font-bold py-3 px-12 rounded-full shadow-2xl shadow-brand-purple/40 transform hover:scale-105 transition-all duration-300 flex items-center gap-2"
         >
           <SparklesIcon className="w-5 h-5" />
-          콘텐츠 생성
+          {t('analysis.generateContent')}
         </button>
       </div>
     </div>
diff --git a/src/pages/Analysis/LoadingSection.tsx b/src/pages/Analysis/LoadingSection.tsx
index 6191dd2..1643c9f 100755
--- a/src/pages/Analysis/LoadingSection.tsx
+++ b/src/pages/Analysis/LoadingSection.tsx
@@ -1,7 +1,9 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 const LoadingSection: React.FC = () => {
+  const { t } = useTranslation();
   return (
     <div className="loading-container">
       <div className="loading-content">
@@ -12,7 +14,7 @@ const LoadingSection: React.FC = () => {
 
         {/* Loading Spinner and Text */}
         <div className="loading-section">
-          <h2 className="loading-title">브랜드 분석 중</h2>
+          <h2 className="loading-title">{t('analysis.loadingTitle')}</h2>
 
           <div className="loading-spinner-wrapper">
             <img
diff --git a/src/pages/Dashboard/ADO2ContentsPage.tsx b/src/pages/Dashboard/ADO2ContentsPage.tsx
index 6482288..4fcc18e 100644
--- a/src/pages/Dashboard/ADO2ContentsPage.tsx
+++ b/src/pages/Dashboard/ADO2ContentsPage.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { getVideosList, deleteVideo } from '../../utils/api';
 import { VideoListItem } from '../../types/api';
 import SocialPostingModal from '../../components/SocialPostingModal';
@@ -9,6 +10,7 @@ interface ADO2ContentsPageProps {
 }
 
 const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
+  const { t } = useTranslation();
   const [videos, setVideos] = useState<VideoListItem[]>([]);
   const [total, setTotal] = useState(0);
   const [loading, setLoading] = useState(true);
@@ -45,7 +47,7 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
       setHasPrev(response.has_prev);
     } catch (err) {
       console.error('Failed to fetch videos:', err);
-      setError('콘텐츠를 불러오는데 실패했습니다.');
+      setError(t('ado2Contents.loadFailed'));
     } finally {
       setLoading(false);
     }
@@ -84,7 +86,7 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
       document.body.removeChild(a);
     } catch (err) {
       console.error('Download failed:', err);
-      alert('다운로드에 실패했습니다.');
+      alert(t('ado2Contents.downloadFailed'));
     }
   };
 
@@ -126,7 +128,7 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
       setDeleteTargetId(null);
     } catch (err) {
       console.error('Delete failed:', err);
-      alert('삭제에 실패했습니다.');
+      alert(t('ado2Contents.deleteFailed'));
     } finally {
       setIsDeleting(false);
     }
@@ -136,24 +138,24 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
     <div className="ado2-contents-page">
       {/* Header */}
       <div className="ado2-contents-header">
-        <h1 className="ado2-contents-title">ADO2 콘텐츠</h1>
-        <span className="ado2-contents-count">총 {total}개</span>
+        <h1 className="ado2-contents-title">{t('ado2Contents.title')}</h1>
+        <span className="ado2-contents-count">{t('ado2Contents.totalCount', { count: total })}</span>
       </div>
 
       {/* Content Grid */}
       {loading ? (
         <div className="ado2-contents-loading">
           <div className="loading-spinner"></div>
-          <p>콘텐츠를 불러오는 중...</p>
+          <p>{t('ado2Contents.loading')}</p>
         </div>
       ) : error ? (
         <div className="ado2-contents-error">
           <p>{error}</p>
-          <button onClick={fetchVideos} className="retry-btn">다시 시도</button>
+          <button onClick={fetchVideos} className="retry-btn">{t('ado2Contents.retry')}</button>
         </div>
       ) : videos.length === 0 ? (
         <div className="ado2-contents-empty">
-          <p>생성된 콘텐츠가 없습니다.</p>
+          <p>{t('ado2Contents.noContent')}</p>
         </div>
       ) : (
         <>
@@ -212,13 +214,13 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
                         <path d="M10 3v10M10 13l-4-4M10 13l4-4"/>
                         <path d="M3 15v2h14v-2"/>
                       </svg>
-                      <span>다운로드</span>
+                      <span>{t('ado2Contents.download')}</span>
                     </button>
                     <button
                       className="content-upload-btn"
                       onClick={() => handleUploadClick(video)}
                       disabled={!video.result_movie_url}
-                      title="소셜 미디어에 업로드"
+                      title={t('ado2Contents.uploadToSocial')}
                     >
                       <svg width="20" height="20" viewBox="0 0 20 20" fill="none" stroke="currentColor" strokeWidth="1.5">
                         <path d="M10 13V3M10 3l-4 4M10 3l4 4"/>
@@ -248,7 +250,7 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
               onClick={() => setPage(p => p - 1)}
               disabled={!hasPrev}
             >
-              이전
+              {t('ado2Contents.previous')}
             </button>
             <span className="pagination-info">{page} / {totalPages}</span>
             <button
@@ -256,7 +258,7 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
               onClick={() => setPage(p => p + 1)}
               disabled={!hasNext}
             >
-              다음
+              {t('ado2Contents.next')}
             </button>
           </div>
         </>
@@ -266,22 +268,22 @@ const ADO2ContentsPage: React.FC<ADO2ContentsPageProps> = ({ onBack }) => {
       {deleteModalOpen && (
         <div className="delete-modal-overlay" onClick={handleDeleteCancel}>
           <div className="delete-modal" onClick={(e: React.MouseEvent) => e.stopPropagation()}>
-            <h2 className="delete-modal-title">정말 콘텐츠를 삭제할까요?</h2>
-            <p className="delete-modal-description">삭제한 파일은 복구할 수 없어요.</p>
+            <h2 className="delete-modal-title">{t('ado2Contents.deleteConfirmTitle')}</h2>
+            <p className="delete-modal-description">{t('ado2Contents.deleteConfirmDesc')}</p>
             <div className="delete-modal-actions">
               <button
                 className="delete-modal-btn cancel"
                 onClick={handleDeleteCancel}
                 disabled={isDeleting}
               >
-                취소
+                {t('ado2Contents.cancel')}
               </button>
               <button
                 className="delete-modal-btn confirm"
                 onClick={handleDeleteConfirm}
                 disabled={isDeleting}
               >
-                {isDeleting ? '삭제 중...' : '삭제'}
+                {isDeleting ? t('ado2Contents.deleting') : t('ado2Contents.delete')}
               </button>
             </div>
           </div>
diff --git a/src/pages/Dashboard/AssetManagementContent.tsx b/src/pages/Dashboard/AssetManagementContent.tsx
index 05c4229..6bb6ad3 100755
--- a/src/pages/Dashboard/AssetManagementContent.tsx
+++ b/src/pages/Dashboard/AssetManagementContent.tsx
@@ -1,5 +1,6 @@
 
 import React, { useRef, useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { ImageItem, ImageUrlItem } from '../../types/api';
 import { uploadImages } from '../../utils/api';
 
@@ -18,6 +19,7 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
   onRemoveImage,
   onAddImages,
 }) => {
+  const { t } = useTranslation();
   const fileInputRef = useRef<HTMLInputElement>(null);
   const imageListRef = useRef<HTMLDivElement>(null);
   const [isUploading, setIsUploading] = useState(false);
@@ -65,7 +67,7 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
       }
     } catch (error) {
       console.error('Image upload failed:', error);
-      setUploadError(error instanceof Error ? error.message : '이미지 업로드에 실패했습니다.');
+      setUploadError(error instanceof Error ? error.message : t('assetManagement.uploadFailed'));
     } finally {
       setIsUploading(false);
     }
@@ -109,13 +111,13 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
   return (
     <main className="page-container">
       {/* Title */}
-      <h1 className="asset-title">브랜드 에셋</h1>
+      <h1 className="asset-title">{t('assetManagement.title')}</h1>
 
       {/* Main Content Container */}
       <div className="asset-container">
         {/* Left Column - Selected Images */}
         <div className="asset-column asset-column-left">
-          <h3 className="asset-section-title">선택된 이미지</h3>
+          <h3 className="asset-section-title">{t('assetManagement.selectedImages')}</h3>
           <div
             ref={imageListRef}
             onWheel={handleImageListWheel}
@@ -127,10 +129,10 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
                   <div key={i} className="asset-image-item">
                     <img
                       src={getImageSrc(item)}
-                      alt={`이미지 ${i + 1}`}
+                      alt={`${t('assetManagement.imageAlt')} ${i + 1}`}
                     />
                     {item.type === 'file' && (
-                      <div className="asset-image-badge">업로드</div>
+                      <div className="asset-image-badge">{t('assetManagement.uploadBadge')}</div>
                     )}
                     <button
                       onClick={() => onRemoveImage(i)}
@@ -152,7 +154,7 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
         <div className="asset-column asset-column-right">
           {/* Image Upload Section */}
           <div className="asset-upload-section">
-            <h3 className="asset-section-title">이미지 업로드</h3>
+            <h3 className="asset-section-title">{t('assetManagement.imageUpload')}</h3>
             <div
               onClick={handleFileSelect}
               onDragOver={handleDragOver}
@@ -160,7 +162,9 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
               className="asset-upload-zone"
             >
               <p className="asset-upload-text">
-                이미지를 드래그하여<br/>업로드
+                {t('assetManagement.dragAndDrop').split('\n').map((line, i) => (
+                  <React.Fragment key={i}>{i > 0 && <br/>}{line}</React.Fragment>
+                ))}
               </p>
             </div>
             <input
@@ -175,7 +179,7 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
 
           {/* Video Ratio Section */}
           <div className="asset-ratio-section">
-            <h3 className="asset-section-title">영상 비율</h3>
+            <h3 className="asset-section-title">{t('assetManagement.videoRatio')}</h3>
             <div className="asset-ratio-buttons">
               <button
                 onClick={() => handleVideoRatioChange('vertical')}
@@ -210,7 +214,7 @@ const AssetManagementContent: React.FC<AssetManagementContentProps> = ({
           disabled={imageList.length === 0 || isUploading}
           className="asset-next-button"
         >
-          {isUploading ? '업로드 중...' : '다음 단계'}
+          {isUploading ? t('assetManagement.uploading') : t('assetManagement.nextStep')}
         </button>
       </div>
     </main>
diff --git a/src/pages/Dashboard/BusinessSettingsContent.tsx b/src/pages/Dashboard/BusinessSettingsContent.tsx
index d172ec3..1252733 100755
--- a/src/pages/Dashboard/BusinessSettingsContent.tsx
+++ b/src/pages/Dashboard/BusinessSettingsContent.tsx
@@ -1,31 +1,36 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
-const SocialItem: React.FC<{ platform: string; icon: React.ReactNode; color: string }> = ({ platform, icon, color }) => (
-  <div className="social-item">
-    <div className="social-item-left">
-      <div className="social-item-icon" style={{ backgroundColor: color }}>
-        <div className="social-item-icon-inner">{icon}</div>
+const SocialItem: React.FC<{ platform: string; icon: React.ReactNode; color: string }> = ({ platform, icon, color }) => {
+  const { t } = useTranslation();
+  return (
+    <div className="social-item">
+      <div className="social-item-left">
+        <div className="social-item-icon" style={{ backgroundColor: color }}>
+          <div className="social-item-icon-inner">{icon}</div>
+        </div>
+        <span className="social-item-name">{platform}</span>
       </div>
-      <span className="social-item-name">{platform}</span>
+      <button className="social-item-connect">{t('businessSettings.connect')}</button>
     </div>
-    <button className="social-item-connect">연결하기</button>
-  </div>
-);
+  );
+};
 
 const BusinessSettingsContent: React.FC = () => {
+  const { t } = useTranslation();
   return (
     <div className="settings-container">
       <div className="settings-header">
-        <h1 className="settings-title">비즈니스 설정</h1>
+        <h1 className="settings-title">{t('businessSettings.title')}</h1>
         <p className="settings-description">
-          펜션 정보와 YouTube 채널을 설정하여 자동 업로드를 활성화하세요
+          {t('businessSettings.description')}
         </p>
       </div>
 
       <div className="settings-card">
         <div className="settings-card-inner">
-          <h2 className="settings-card-title">공유</h2>
+          <h2 className="settings-card-title">{t('businessSettings.sharing')}</h2>
 
           <div className="social-items">
             <SocialItem
diff --git a/src/pages/Dashboard/CompletionContent.tsx b/src/pages/Dashboard/CompletionContent.tsx
index 61e2a6f..1d81695 100755
--- a/src/pages/Dashboard/CompletionContent.tsx
+++ b/src/pages/Dashboard/CompletionContent.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect, useRef } from 'react';
+import { useTranslation } from 'react-i18next';
 import { generateVideo, waitForVideoComplete, getYouTubeConnectUrl, getSocialAccounts, disconnectSocialAccount, TokenExpiredError, handleSocialReconnect } from '../../utils/api';
 import { SocialAccount } from '../../types/api';
 
@@ -30,6 +31,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
   onVideoStatusChange,
   onVideoProgressChange
 }) => {
+  const { t } = useTranslation();
   const [selectedSocials, setSelectedSocials] = useState<string[]>([]);
   const [videoStatus, setVideoStatus] = useState<VideoStatus>('idle');
   const [videoUrl, setVideoUrl] = useState<string | null>(null);
@@ -123,7 +125,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
 
     hasStartedGeneration.current = true;
     setVideoStatus('generating');
-    setStatusMessage('영상 생성을 요청하고 있습니다...');
+    setStatusMessage(t('completion.requestingGeneration'));
     setErrorMessage(null);
 
     try {
@@ -134,11 +136,11 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
       const videoResponse = await generateVideo(songTaskId, orientation);
 
       if (!videoResponse.success) {
-        throw new Error(videoResponse.error_message || '영상 생성 요청에 실패했습니다.');
+        throw new Error(videoResponse.error_message || t('completion.generationFailed'));
       }
 
       setVideoStatus('polling');
-      setStatusMessage('영상을 생성하고 있습니다...');
+      setStatusMessage(t('completion.generatingVideo'));
       // video/status API는 creatomate_render_id를 사용
       saveToStorage(videoResponse.creatomate_render_id, songTaskId, 'polling', null);
 
@@ -147,7 +149,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
     } catch (error) {
       console.error('Video generation failed:', error);
       setVideoStatus('error');
-      setErrorMessage(error instanceof Error ? error.message : '영상 생성 중 오류가 발생했습니다.');
+      setErrorMessage(error instanceof Error ? error.message : t('completion.generationError'));
       hasStartedGeneration.current = false;
       clearStorage();
     }
@@ -157,17 +159,17 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
   const getStatusMessage = (status: string): string => {
     switch (status) {
       case 'planned':
-        return '예약됨';
+        return t('completion.statusPlanned');
       case 'waiting':
-        return '대기 중';
+        return t('completion.statusWaiting');
       case 'transcribing':
-        return '트랜스크립션 중';
+        return t('completion.statusTranscribing');
       case 'rendering':
-        return '렌더링 중';
+        return t('completion.statusRendering');
       case 'succeeded':
-        return '완료';
+        return t('completion.statusSucceeded');
       default:
-        return '처리 중...';
+        return t('completion.statusDefault');
     }
   };
 
@@ -209,7 +211,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
         setStatusMessage('');
         saveToStorage(videoTaskId, currentSongTaskId, 'complete', videoUrlFromResponse);
       } else {
-        throw new Error('영상 URL을 받지 못했습니다.');
+        throw new Error(t('completion.videoUrlMissing'));
       }
 
     } catch (error) {
@@ -217,10 +219,10 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
 
       if (error instanceof Error && error.message === 'TIMEOUT') {
         setVideoStatus('error');
-        setErrorMessage('영상 생성 시간이 초과되었습니다. 다시 시도해주세요.');
+        setErrorMessage(t('completion.generationTimeout'));
       } else {
         setVideoStatus('error');
-        setErrorMessage(error instanceof Error ? error.message : '영상 생성 중 오류가 발생했습니다.');
+        setErrorMessage(error instanceof Error ? error.message : t('completion.generationError'));
       }
 
       hasStartedGeneration.current = false;
@@ -255,7 +257,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
       } else if (savedState.status === 'polling') {
         // 폴링 중이었던 경우 다시 폴링
         setVideoStatus('polling');
-        setStatusMessage('영상을 처리하고 있습니다... (새로고침 후 복구됨)');
+        setStatusMessage(t('completion.processingAfterRefresh'));
         hasStartedGeneration.current = true;
         pollVideoStatus(savedState.videoTaskId, savedState.songTaskId);
       }
@@ -318,7 +320,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
       }
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('completion.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
@@ -357,12 +359,12 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
       window.location.href = response.auth_url;
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('completion.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
       console.error('YouTube connect failed:', error);
-      setYoutubeError('YouTube 연결에 실패했습니다.');
+      setYoutubeError(t('completion.youtubeConnectFailed'));
       setIsYoutubeConnecting(false);
     }
   };
@@ -377,12 +379,12 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
       setSelectedSocials(prev => prev.filter(s => s !== 'Youtube'));
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('completion.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
       console.error('YouTube disconnect failed:', error);
-      setYoutubeError('연결 해제에 실패했습니다.');
+      setYoutubeError(t('completion.disconnectFailed'));
     }
   };
 
@@ -430,24 +432,24 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
   // 소셜 채널에 배포
   const handleDeploy = () => {
     if (selectedSocials.length === 0) {
-      alert('배포할 소셜 채널을 선택해주세요.');
+      alert(t('completion.selectSocialChannel'));
       return;
     }
 
     if (!videoUrl) {
-      alert('영상이 아직 준비되지 않았습니다.');
+      alert(t('completion.videoNotReady'));
       return;
     }
 
     // 선택된 채널 중 YouTube가 있고 연결된 경우
     if (selectedSocials.includes('Youtube') && youtubeAccount) {
       // TODO: YouTube 업로드 API 호출
-      alert(`YouTube 채널 "${youtubeAccount.display_name}"에 영상을 업로드합니다.\n\n(업로드 기능 준비 중)`);
+      alert(t('completion.youtubeUploadMessage', { channelName: youtubeAccount.display_name }));
       return;
     }
 
     // 다른 플랫폼 선택 시
-    alert('선택한 소셜 채널에 배포 기능이 준비 중입니다.');
+    alert(t('completion.deployComingSoon'));
   };
 
   const handleRetry = () => {
@@ -482,20 +484,20 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
             <path d="M15 18l-6-6 6-6" />
           </svg>
-          <span>뒤로가기</span>
+          <span>{t('completion.back')}</span>
         </button>
       </div>
 
       {/* Title */}
       <h1 className="completion-title">
-        {isLoading ? '영상 생성 중' : videoStatus === 'error' ? '영상 생성 실패' : '콘텐츠 제작 완료'}
+        {isLoading ? t('completion.titleGenerating') : videoStatus === 'error' ? t('completion.titleError') : t('completion.titleComplete')}
       </h1>
 
       {/* Main Content Container */}
       <div className="completion-container">
         {/* Left: Video Preview */}
         <div className="completion-column completion-column-left video-preview-card">
-          <h3 className="asset-section-title">이미지 및 영상</h3>
+          <h3 className="asset-section-title">{t('completion.imageAndVideo')}</h3>
 
           <div className="completion-video-wrapper">
             <div className="video-container">
@@ -519,7 +521,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
                   </svg>
                   <p className="text-gray-400 mb-4">{errorMessage}</p>
                   <button onClick={handleRetry} className="btn-secondary">
-                    다시 시도
+                    {t('completion.retry')}
                   </button>
                 </div>
               ) : videoUrl ? (
@@ -561,12 +563,17 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
           {/* AI Optimization Tags - only show when complete */}
           {videoStatus === 'complete' && (
             <div className="ai-optimization-section">
-              <h3 className="ai-optimization-title">AI 최적화</h3>
+              <h3 className="ai-optimization-title">{t('completion.aiOptimization')}</h3>
               <div className="ai-optimization-tags">
-                {['색상 보정', '다이나믹 자막', '비트 싱크', 'SEO 메타 태그'].map(tag => (
-                  <div key={tag} className="ai-tag">
+                {[
+                  { key: 'colorCorrection', label: t('completion.aiTagColorCorrection') },
+                  { key: 'dynamicSubtitle', label: t('completion.aiTagDynamicSubtitle') },
+                  { key: 'beatSync', label: t('completion.aiTagBeatSync') },
+                  { key: 'seoMeta', label: t('completion.aiTagSEOMeta') },
+                ].map(tag => (
+                  <div key={tag.key} className="ai-tag">
                     <div className="ai-tag-dot"></div>
-                    <span className="ai-tag-text">{tag}</span>
+                    <span className="ai-tag-text">{tag.label}</span>
                   </div>
                 ))}
               </div>
@@ -577,7 +584,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
         {/* Right: Sharing */}
         <div className="completion-column completion-column-right sharing-card">
           <div className="sharing-content">
-            <h3 className="asset-section-title">공유</h3>
+            <h3 className="asset-section-title">{t('completion.sharing')}</h3>
 
             <div className="social-list-new">
               {socials.map(social => {
@@ -616,14 +623,14 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
                       </div>
                     </div>
                     {social.isConnecting ? (
-                      <span className="completion-social-status connecting">연결 중...</span>
+                      <span className="completion-social-status connecting">{t('completion.connecting')}</span>
                     ) : social.connected ? (
                       <div className="completion-social-actions">
                         <span className="completion-social-status connected">
                           <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
                             <polyline points="20 6 9 17 4 12" />
                           </svg>
-                          인증됨
+                          {t('completion.authenticated')}
                         </span>
                         {isYoutube && (
                           <button
@@ -633,13 +640,13 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
                             }}
                             className="completion-social-disconnect"
                           >
-                            해제
+                            {t('completion.disconnect')}
                           </button>
                         )}
                       </div>
                     ) : (
                       <span className="completion-social-status not-connected">
-                        {isYoutube ? '계정 연결' : '준비 중'}
+                        {isYoutube ? t('completion.connectAccount') : t('completion.comingSoon')}
                       </span>
                     )}
                   </div>
@@ -657,7 +664,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
               disabled={selectedSocials.length === 0 || videoStatus !== 'complete'}
               className="btn-completion-deploy"
             >
-              소셜 채널에 배포
+              {t('completion.deployToSocial')}
             </button>
 
             <button
@@ -665,7 +672,7 @@ const CompletionContent: React.FC<CompletionContentProps> = ({
               disabled={videoStatus !== 'complete' || !videoUrl}
               className="btn-completion-download"
             >
-              MP4 파일 다운로드
+              {t('completion.downloadMp4')}
             </button>
           </div>
         </div>
diff --git a/src/pages/Dashboard/DashboardContent.tsx b/src/pages/Dashboard/DashboardContent.tsx
index a958540..743e825 100755
--- a/src/pages/Dashboard/DashboardContent.tsx
+++ b/src/pages/Dashboard/DashboardContent.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 
 // =====================================================
 // Types
@@ -263,6 +264,7 @@ const formatNumber = (num: number): string => {
 };
 
 const YearOverYearChart: React.FC<{ data: MonthlyData[] }> = ({ data }) => {
+  const { t } = useTranslation();
   const [tooltip, setTooltip] = useState<TooltipData | null>(null);
   const [isAnimated, setIsAnimated] = useState(false);
 
@@ -420,12 +422,12 @@ const YearOverYearChart: React.FC<{ data: MonthlyData[] }> = ({ data }) => {
           <div className="chart-tooltip-title">{tooltip.month}</div>
           <div className="chart-tooltip-row">
             <span className="chart-tooltip-dot mint"></span>
-            <span className="chart-tooltip-label">올해</span>
+            <span className="chart-tooltip-label">{t('dashboard.thisYear')}</span>
             <span className="chart-tooltip-value">{formatNumber(tooltip.thisYear)}</span>
           </div>
           <div className="chart-tooltip-row">
             <span className="chart-tooltip-dot purple"></span>
-            <span className="chart-tooltip-label">작년</span>
+            <span className="chart-tooltip-label">{t('dashboard.lastYear')}</span>
             <span className="chart-tooltip-value">{formatNumber(tooltip.lastYear)}</span>
           </div>
           <div className="chart-tooltip-change">
@@ -517,6 +519,7 @@ const AudienceBarChart: React.FC<{ data: { label: string; percentage: number }[]
 };
 
 const GenderChart: React.FC<{ male: number; female: number; delay?: number }> = ({ male, female, delay = 0 }) => {
+  const { t } = useTranslation();
   const [isAnimated, setIsAnimated] = useState(false);
 
   useEffect(() => {
@@ -535,8 +538,8 @@ const GenderChart: React.FC<{ male: number; female: number; delay?: number }> =
         </div>
       </div>
       <div className="gender-chart-labels">
-        <span className="gender-label male">남성</span>
-        <span className="gender-label female">여성</span>
+        <span className="gender-label male">{t('dashboard.male')}</span>
+        <span className="gender-label female">{t('dashboard.female')}</span>
       </div>
     </div>
   );
@@ -547,9 +550,97 @@ const GenderChart: React.FC<{ male: number; female: number; delay?: number }> =
 // =====================================================
 
 const DashboardContent: React.FC = () => {
+  const { t } = useTranslation();
   const [selectedPlatform, setSelectedPlatform] = useState<'youtube' | 'instagram'>('youtube');
 
-  const currentPlatformData = PLATFORM_DATA.find(p => p.platform === selectedPlatform);
+  // Translated content metrics
+  const contentMetrics: ContentMetric[] = [
+    { id: 'impressions', label: t('dashboard.metricImpressions'), labelEn: 'IMPRESSIONS', value: '2.4M', trend: 12.5, trendDirection: 'up' },
+    { id: 'reach', label: t('dashboard.metricReach'), labelEn: 'REACH', value: '1.8M', trend: 9.2, trendDirection: 'up' },
+    { id: 'likes', label: t('dashboard.metricLikes'), labelEn: 'LIKES', value: '158.2K', trend: 8.3, trendDirection: 'up' },
+    { id: 'comments', label: t('dashboard.metricComments'), labelEn: 'COMMENTS', value: '24.9K', trend: 2.1, trendDirection: 'down' },
+    { id: 'shares', label: t('dashboard.metricShares'), labelEn: 'SHARES', value: '8.4K', trend: 15.7, trendDirection: 'up' },
+    { id: 'saves', label: t('dashboard.metricSaves'), labelEn: 'SAVES', value: '12.3K', trend: 22.4, trendDirection: 'up' },
+    { id: 'engagement', label: t('dashboard.metricEngagement'), labelEn: 'ENGAGEMENT', value: '4.8%', trend: 0.5, trendDirection: 'up' },
+    { id: 'content', label: t('dashboard.metricContent'), labelEn: 'CONTENT', value: '127', trend: 4, trendDirection: 'up' },
+  ];
+
+  // Translated monthly data
+  const monthlyData: MonthlyData[] = [
+    { month: t('dashboard.months.jan'), thisYear: 180000, lastYear: 145000 },
+    { month: t('dashboard.months.feb'), thisYear: 195000, lastYear: 158000 },
+    { month: t('dashboard.months.mar'), thisYear: 210000, lastYear: 172000 },
+    { month: t('dashboard.months.apr'), thisYear: 185000, lastYear: 168000 },
+    { month: t('dashboard.months.may'), thisYear: 240000, lastYear: 195000 },
+    { month: t('dashboard.months.jun'), thisYear: 275000, lastYear: 210000 },
+    { month: t('dashboard.months.jul'), thisYear: 320000, lastYear: 235000 },
+    { month: t('dashboard.months.aug'), thisYear: 295000, lastYear: 248000 },
+    { month: t('dashboard.months.sep'), thisYear: 310000, lastYear: 262000 },
+    { month: t('dashboard.months.oct'), thisYear: 285000, lastYear: 255000 },
+    { month: t('dashboard.months.nov'), thisYear: 340000, lastYear: 278000 },
+    { month: t('dashboard.months.dec'), thisYear: 380000, lastYear: 295000 },
+  ];
+
+  // Translated platform data
+  const platformData: PlatformData[] = [
+    {
+      platform: 'youtube',
+      displayName: 'YouTube',
+      metrics: [
+        { id: 'views', label: t('dashboard.youtubeMetrics.views'), value: '1.25M', trend: 18.2, trendDirection: 'up' },
+        { id: 'watchTime', label: t('dashboard.youtubeMetrics.watchTime'), value: '4,820', unit: t('dashboard.youtubeMetrics.watchTimeUnit'), trend: 12.5, trendDirection: 'up' },
+        { id: 'avgViewDuration', label: t('dashboard.youtubeMetrics.avgViewDuration'), value: '3:24', trend: 5.2, trendDirection: 'up' },
+        { id: 'subscribers', label: t('dashboard.youtubeMetrics.subscribers'), value: '45.2K', trend: 5.8, trendDirection: 'up' },
+        { id: 'newSubscribers', label: t('dashboard.youtubeMetrics.newSubscribers'), value: '1.2K', trend: 12.3, trendDirection: 'up' },
+        { id: 'engagement', label: t('dashboard.youtubeMetrics.engagement'), value: '4.8', unit: '%', trend: 0.3, trendDirection: 'up' },
+        { id: 'ctr', label: t('dashboard.youtubeMetrics.ctr'), value: '6.2', unit: '%', trend: 1.1, trendDirection: 'up' },
+        { id: 'revenue', label: t('dashboard.youtubeMetrics.revenue'), value: '₩2.4M', trend: 8.5, trendDirection: 'up' },
+      ],
+    },
+    {
+      platform: 'instagram',
+      displayName: 'Instagram',
+      metrics: [
+        { id: 'reach', label: t('dashboard.instagramMetrics.reach'), value: '892K', trend: 22.4, trendDirection: 'up' },
+        { id: 'impressions', label: t('dashboard.instagramMetrics.impressions'), value: '1.58M', trend: 15.1, trendDirection: 'up' },
+        { id: 'profileVisits', label: t('dashboard.instagramMetrics.profileVisits'), value: '28.4K', trend: 18.7, trendDirection: 'up' },
+        { id: 'followers', label: t('dashboard.instagramMetrics.followers'), value: '28.5K', trend: 8.2, trendDirection: 'up' },
+        { id: 'newFollowers', label: t('dashboard.instagramMetrics.newFollowers'), value: '892', trend: 15.6, trendDirection: 'up' },
+        { id: 'storyViews', label: t('dashboard.instagramMetrics.storyViews'), value: '156K', trend: 3.2, trendDirection: 'down' },
+        { id: 'reelPlays', label: t('dashboard.instagramMetrics.reelPlays'), value: '423K', trend: 45.2, trendDirection: 'up' },
+        { id: 'websiteClicks', label: t('dashboard.instagramMetrics.websiteClicks'), value: '3.2K', trend: 11.8, trendDirection: 'up' },
+      ],
+    },
+  ];
+
+  // Translated top content
+  const topContent: TopContent[] = [
+    { id: '1', title: t('dashboard.topContentTitles.winterPromotion'), thumbnail: 'https://picsum.photos/seed/content1/120/68', platform: 'youtube', views: '125.4K', engagement: '8.2%', date: '2025.01.15' },
+    { id: '2', title: t('dashboard.topContentTitles.stayIntroReel'), thumbnail: 'https://picsum.photos/seed/content2/120/68', platform: 'instagram', views: '89.2K', engagement: '12.5%', date: '2025.01.22' },
+    { id: '3', title: t('dashboard.topContentTitles.newYearEvent'), thumbnail: 'https://picsum.photos/seed/content3/120/68', platform: 'youtube', views: '67.8K', engagement: '6.4%', date: '2025.01.08' },
+    { id: '4', title: t('dashboard.topContentTitles.nightTimelapse'), thumbnail: 'https://picsum.photos/seed/content4/120/68', platform: 'instagram', views: '54.3K', engagement: '15.8%', date: '2025.01.28' },
+  ];
+
+  // Translated audience data
+  const audienceData: AudienceData = {
+    ageGroups: [
+      { label: '18-24', percentage: 12 },
+      { label: '25-34', percentage: 35 },
+      { label: '35-44', percentage: 28 },
+      { label: '45-54', percentage: 18 },
+      { label: '55+', percentage: 7 },
+    ],
+    gender: { male: 42, female: 58 },
+    topRegions: [
+      { region: t('dashboard.regions.seoul'), percentage: 32 },
+      { region: t('dashboard.regions.gyeonggi'), percentage: 24 },
+      { region: t('dashboard.regions.busan'), percentage: 12 },
+      { region: t('dashboard.regions.incheon'), percentage: 8 },
+      { region: t('dashboard.regions.daegu'), percentage: 6 },
+    ],
+  };
+
+  const currentPlatformData = platformData.find(p => p.platform === selectedPlatform);
   const lastUpdated = new Date().toLocaleDateString('ko-KR', {
     year: 'numeric',
     month: '2-digit',
@@ -564,18 +655,18 @@ const DashboardContent: React.FC = () => {
       <AnimatedSection delay={0}>
         <div className="dashboard-header-row">
           <div>
-            <h1 className="dashboard-title">대시보드</h1>
-            <p className="dashboard-description">실시간 마케팅 퍼포먼스를 확인하세요.</p>
+            <h1 className="dashboard-title">{t('dashboard.title')}</h1>
+            <p className="dashboard-description">{t('dashboard.description')}</p>
           </div>
-          <span className="dashboard-last-updated">마지막 업데이트: {lastUpdated}</span>
+          <span className="dashboard-last-updated">{t('dashboard.lastUpdated')} {lastUpdated}</span>
         </div>
       </AnimatedSection>
 
       {/* Content Performance Section */}
       <AnimatedSection delay={100} className="dashboard-section">
-        <h2 className="dashboard-section-title">콘텐츠 성과</h2>
+        <h2 className="dashboard-section-title">{t('dashboard.contentPerformance')}</h2>
         <div className="stats-grid-8">
-          {CONTENT_METRICS.map((metric, index) => (
+          {contentMetrics.map((metric, index) => (
             <AnimatedItem key={metric.id} index={index} baseDelay={200}>
               <StatCard {...metric} />
             </AnimatedItem>
@@ -589,23 +680,23 @@ const DashboardContent: React.FC = () => {
         <AnimatedSection delay={600}>
           <div className="yoy-chart-card">
             <div className="yoy-chart-header">
-              <h2 className="dashboard-section-title">전년 대비 성장</h2>
+              <h2 className="dashboard-section-title">{t('dashboard.yearOverYear')}</h2>
               <div className="chart-legend-dual">
                 <div className="chart-legend-item">
                   <span className="chart-legend-line solid"></span>
-                  <span className="chart-legend-text">올해</span>
+                  <span className="chart-legend-text">{t('dashboard.thisYear')}</span>
                 </div>
                 <div className="chart-legend-item">
                   <span className="chart-legend-line dashed"></span>
-                  <span className="chart-legend-text">작년</span>
+                  <span className="chart-legend-text">{t('dashboard.lastYear')}</span>
                 </div>
               </div>
             </div>
             <div className="yoy-chart-container">
-              <YearOverYearChart data={MONTHLY_DATA} />
+              <YearOverYearChart data={monthlyData} />
             </div>
             <div className="yoy-chart-xaxis">
-              {MONTHLY_DATA.map(d => (
+              {monthlyData.map(d => (
                 <span key={d.month}>{d.month}</span>
               ))}
             </div>
@@ -615,9 +706,9 @@ const DashboardContent: React.FC = () => {
         {/* Top Content Section */}
         <AnimatedSection delay={700}>
           <div className="top-content-card">
-            <h2 className="dashboard-section-title">인기 콘텐츠</h2>
+            <h2 className="dashboard-section-title">{t('dashboard.popularContent')}</h2>
             <div className="top-content-list">
-              {TOP_CONTENT.map((content, index) => (
+              {topContent.map((content, index) => (
                 <AnimatedItem key={content.id} index={index} baseDelay={800}>
                   <TopContentItem {...content} />
                 </AnimatedItem>
@@ -629,24 +720,24 @@ const DashboardContent: React.FC = () => {
 
       {/* Audience Insights Section */}
       <AnimatedSection delay={1000} className="audience-section">
-        <h2 className="dashboard-section-title">오디언스 인사이트</h2>
+        <h2 className="dashboard-section-title">{t('dashboard.audienceInsights')}</h2>
         <div className="audience-cards">
           <AnimatedItem index={0} baseDelay={1100}>
             <div className="audience-card">
-              <h3 className="audience-card-title">연령대 분포</h3>
-              <AudienceBarChart data={AUDIENCE_DATA.ageGroups} delay={1200} />
+              <h3 className="audience-card-title">{t('dashboard.ageDistribution')}</h3>
+              <AudienceBarChart data={audienceData.ageGroups} delay={1200} />
             </div>
           </AnimatedItem>
           <AnimatedItem index={1} baseDelay={1100}>
             <div className="audience-card">
-              <h3 className="audience-card-title">성별 분포</h3>
-              <GenderChart male={AUDIENCE_DATA.gender.male} female={AUDIENCE_DATA.gender.female} delay={1300} />
+              <h3 className="audience-card-title">{t('dashboard.genderDistribution')}</h3>
+              <GenderChart male={audienceData.gender.male} female={audienceData.gender.female} delay={1300} />
             </div>
           </AnimatedItem>
           <AnimatedItem index={2} baseDelay={1100}>
             <div className="audience-card">
-              <h3 className="audience-card-title">상위 지역</h3>
-              <AudienceBarChart data={AUDIENCE_DATA.topRegions.map(r => ({ label: r.region, percentage: r.percentage }))} delay={1400} />
+              <h3 className="audience-card-title">{t('dashboard.topRegions')}</h3>
+              <AudienceBarChart data={audienceData.topRegions.map(r => ({ label: r.region, percentage: r.percentage }))} delay={1400} />
             </div>
           </AnimatedItem>
         </div>
@@ -656,7 +747,7 @@ const DashboardContent: React.FC = () => {
       <AnimatedSection delay={1300}>
         <div className="platform-section-card">
           <div className="platform-section-header">
-            <h2 className="dashboard-section-title">플랫폼별 지표</h2>
+            <h2 className="dashboard-section-title">{t('dashboard.platformMetrics')}</h2>
             <div className="platform-tabs">
               <button
                 className={`platform-tab ${selectedPlatform === 'youtube' ? 'active' : ''}`}
diff --git a/src/pages/Dashboard/GenerationFlow.tsx b/src/pages/Dashboard/GenerationFlow.tsx
index 6f59cea..08f5e84 100755
--- a/src/pages/Dashboard/GenerationFlow.tsx
+++ b/src/pages/Dashboard/GenerationFlow.tsx
@@ -1,5 +1,6 @@
 
 import React, { useEffect, useState } from 'react';
+import { useTranslation } from 'react-i18next';
 import Sidebar from '../../components/Sidebar';
 import AssetManagementContent from './AssetManagementContent';
 import SoundStudioContent from './SoundStudioContent';
@@ -64,6 +65,7 @@ const GenerationFlow: React.FC<GenerationFlowProps> = ({
   businessInfo,
   initialAnalysisData
 }) => {
+  const { t } = useTranslation();
   // localStorage에서 저장된 상태 복원
   const savedActiveItem = localStorage.getItem(ACTIVE_ITEM_KEY);
   const savedWizardStep = localStorage.getItem(WIZARD_STEP_KEY);
@@ -212,7 +214,7 @@ const GenerationFlow: React.FC<GenerationFlowProps> = ({
       goToWizardStep(0); // 브랜드 분석 결과로
     } catch (err) {
       console.error('Autocomplete error:', err);
-      setAnalysisError(err instanceof Error ? err.message : '업체 정보 조회에 실패했습니다.');
+      setAnalysisError(err instanceof Error ? err.message : t('app.autocompleteError'));
       goToWizardStep(-2); // URL 입력으로 돌아가기
     }
   };
@@ -252,7 +254,7 @@ const GenerationFlow: React.FC<GenerationFlowProps> = ({
       goToWizardStep(0); // 브랜드 분석 결과로
     } catch (err) {
       console.error('Crawling failed:', err);
-      const errorMessage = err instanceof Error ? err.message : '분석 중 오류가 발생했습니다. 다시 시도해주세요.';
+      const errorMessage = err instanceof Error ? err.message : t('app.analysisError');
       setAnalysisError(errorMessage);
       goToWizardStep(-2); // URL 입력으로 돌아가기
     }
@@ -403,7 +405,7 @@ const GenerationFlow: React.FC<GenerationFlowProps> = ({
       default:
         return (
           <div className="flex-1 flex items-center justify-center text-gray-500 font-light">
-            {activeItem} 페이지 준비 중입니다.
+            {t('app.pageComingSoon', { page: activeItem })}
           </div>
         );
     }
diff --git a/src/pages/Dashboard/MyInfoContent.tsx b/src/pages/Dashboard/MyInfoContent.tsx
index 2be07e3..9594bae 100644
--- a/src/pages/Dashboard/MyInfoContent.tsx
+++ b/src/pages/Dashboard/MyInfoContent.tsx
@@ -1,11 +1,13 @@
 
 import React, { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { getSocialAccounts, getYouTubeConnectUrl, disconnectSocialAccount, TokenExpiredError, handleSocialReconnect } from '../../utils/api';
 import { SocialAccount } from '../../types/api';
 
 type TabType = 'basic' | 'payment' | 'business';
 
 const MyInfoContent: React.FC = () => {
+  const { t } = useTranslation();
   const [activeTab, setActiveTab] = useState<TabType>('business');
   const [businessUrl, setBusinessUrl] = useState('');
   const [socialAccounts, setSocialAccounts] = useState<SocialAccount[]>([]);
@@ -24,7 +26,7 @@ const MyInfoContent: React.FC = () => {
       setSocialAccounts(response.accounts || []);
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('myInfo.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
@@ -42,7 +44,7 @@ const MyInfoContent: React.FC = () => {
       window.location.href = response.auth_url;
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('myInfo.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
@@ -58,7 +60,7 @@ const MyInfoContent: React.FC = () => {
       setSocialAccounts(prev => prev.filter(acc => acc.id !== accountId));
     } catch (error) {
       if (error instanceof TokenExpiredError) {
-        alert('YouTube 인증이 만료되었습니다. 재연동 페이지로 이동합니다.');
+        alert(t('myInfo.youtubeExpiredAlert'));
         handleSocialReconnect(error.reconnectUrl);
         return;
       }
@@ -76,14 +78,14 @@ const MyInfoContent: React.FC = () => {
   const hasConnectedAccounts = youtubeAccounts.length > 0 || instagramAccounts.length > 0;
 
   const tabs = [
-    { id: 'basic' as TabType, label: '기본 정보' },
-    { id: 'payment' as TabType, label: '결제 정보' },
-    { id: 'business' as TabType, label: '내 비즈니스 & 소셜 채널 관리' },
+    { id: 'basic' as TabType, label: t('myInfo.tabBasic') },
+    { id: 'payment' as TabType, label: t('myInfo.tabPayment') },
+    { id: 'business' as TabType, label: t('myInfo.tabBusiness') },
   ];
 
   return (
     <main className="myinfo-page">
-      <h1 className="myinfo-title">내 정보</h1>
+      <h1 className="myinfo-title">{t('myInfo.title')}</h1>
 
       {/* 탭 네비게이션 */}
       <div className="myinfo-tabs">
@@ -102,13 +104,13 @@ const MyInfoContent: React.FC = () => {
       <div className="myinfo-content">
         {activeTab === 'basic' && (
           <div className="myinfo-section">
-            <p className="myinfo-placeholder">기본 정보 설정 기능이 준비 중입니다.</p>
+            <p className="myinfo-placeholder">{t('myInfo.basicPlaceholder')}</p>
           </div>
         )}
 
         {activeTab === 'payment' && (
           <div className="myinfo-section">
-            <p className="myinfo-placeholder">결제 정보 설정 기능이 준비 중입니다.</p>
+            <p className="myinfo-placeholder">{t('myInfo.paymentPlaceholder')}</p>
           </div>
         )}
 
@@ -116,22 +118,22 @@ const MyInfoContent: React.FC = () => {
           <>
             {/* 내 비즈니스 섹션 */}
             <div className="myinfo-section">
-              <h2 className="myinfo-section-title">내 비즈니스</h2>
+              <h2 className="myinfo-section-title">{t('myInfo.myBusiness')}</h2>
               <div className="myinfo-business-card">
-                <h3 className="myinfo-business-empty-title">아직 등록된 비즈니스가 없어요</h3>
+                <h3 className="myinfo-business-empty-title">{t('myInfo.noBusinessTitle')}</h3>
                 <p className="myinfo-business-empty-desc">
-                  네이버 지도 URL을 입력하면, 영상 제작에 필요한 정보를 자동으로 불러와요
+                  {t('myInfo.noBusinessDesc')}
                 </p>
                 <div className="myinfo-business-input-row">
                   <input
                     type="text"
                     value={businessUrl}
                     onChange={(e) => setBusinessUrl(e.target.value)}
-                    placeholder="네이버 지도 URL 입력"
+                    placeholder={t('myInfo.naverMapUrlPlaceholder')}
                     className="myinfo-business-input"
                   />
                   <button className="myinfo-business-submit">
-                    비즈니스 등록
+                    {t('myInfo.registerBusiness')}
                   </button>
                 </div>
               </div>
@@ -139,7 +141,7 @@ const MyInfoContent: React.FC = () => {
 
             {/* 소셜 채널 섹션 */}
             <div className="myinfo-section">
-              <h2 className="myinfo-section-title">소셜 채널</h2>
+              <h2 className="myinfo-section-title">{t('myInfo.socialChannels')}</h2>
 
               {/* 연결 버튼들 (가로 배치) */}
               <div className="myinfo-social-buttons">
@@ -149,7 +151,7 @@ const MyInfoContent: React.FC = () => {
                   className={`myinfo-social-btn ${youtubeAccounts.length > 0 ? 'connected' : ''}`}
                 >
                   <img src="/assets/images/social-youtube.png" alt="YouTube" className="myinfo-social-btn-icon" />
-                  <span>{isConnecting === 'youtube' ? '연결 중...' : 'YouTube 연결'}</span>
+                  <span>{isConnecting === 'youtube' ? t('myInfo.youtubeConnecting') : t('myInfo.youtubeConnect')}</span>
                 </button>
 
                 <button
@@ -157,7 +159,7 @@ const MyInfoContent: React.FC = () => {
                   className="myinfo-social-btn disabled"
                 >
                   <img src="/assets/images/social-instagram.png" alt="Instagram" className="myinfo-social-btn-icon" />
-                  <span>Instagram 연결</span>
+                  <span>{t('myInfo.instagramConnect')}</span>
                 </button>
               </div>
 
@@ -189,13 +191,13 @@ const MyInfoContent: React.FC = () => {
                           <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
                             <polyline points="20 6 9 17 4 12" />
                           </svg>
-                          연결됨
+                          {t('myInfo.connected')}
                         </span>
                         <button
                           onClick={() => handleDisconnectAccount(account.id)}
                           className="myinfo-connected-disconnect"
                         >
-                          연결 해제
+                          {t('myInfo.disconnectAccount')}
                         </button>
                       </div>
                     </div>
@@ -226,13 +228,13 @@ const MyInfoContent: React.FC = () => {
                           <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
                             <polyline points="20 6 9 17 4 12" />
                           </svg>
-                          연결됨
+                          {t('myInfo.connected')}
                         </span>
                         <button
                           onClick={() => handleDisconnectAccount(account.id)}
                           className="myinfo-connected-disconnect"
                         >
-                          연결 해제
+                          {t('myInfo.disconnectAccount')}
                         </button>
                       </div>
                     </div>
@@ -241,7 +243,7 @@ const MyInfoContent: React.FC = () => {
               )}
 
               {isLoadingAccounts && (
-                <p className="myinfo-loading">계정 정보를 불러오는 중...</p>
+                <p className="myinfo-loading">{t('myInfo.loadingAccounts')}</p>
               )}
             </div>
           </>
diff --git a/src/pages/Dashboard/SoundStudioContent.tsx b/src/pages/Dashboard/SoundStudioContent.tsx
index fb44a1f..e30f7a8 100755
--- a/src/pages/Dashboard/SoundStudioContent.tsx
+++ b/src/pages/Dashboard/SoundStudioContent.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useRef, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { generateLyric, waitForLyricComplete, generateSong, waitForSongComplete } from '../../utils/api';
 import { LANGUAGE_MAP } from '../../types/api';
 
@@ -39,6 +40,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
   videoGenerationStatus = 'idle',
   videoGenerationProgress = 0
 }) => {
+  const { t } = useTranslation();
   const [selectedType, setSelectedType] = useState('보컬');
   const [selectedLang, setSelectedLang] = useState('한국어');
   const [selectedGenre, setSelectedGenre] = useState('자동 선택');
@@ -94,15 +96,15 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
         songId,
         (pollStatus: string) => {
           if (pollStatus === 'streaming') {
-            setStatusMessage('노래를 생성하고 있습니다...');
+            setStatusMessage(t('soundStudio.generatingSong'));
           } else if (pollStatus === 'queued') {
-            setStatusMessage('노래 생성 대기 중...');
+            setStatusMessage(t('soundStudio.songQueued'));
           }
         }
       );
 
       if (!statusResponse.success) {
-        throw new Error(statusResponse.error_message || '음악 생성에 실패했습니다.');
+        throw new Error(statusResponse.error_message || t('soundStudio.musicGenerationFailed'));
       }
 
       // song_result_url을 사용하여 재생
@@ -120,16 +122,16 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
         if (currentRetryCount < MAX_RETRY_COUNT) {
           const newRetryCount = currentRetryCount + 1;
           setRetryCount(newRetryCount);
-          setStatusMessage(`시간 초과로 재생성 중... (${newRetryCount}/${MAX_RETRY_COUNT})`);
+          setStatusMessage(t('soundStudio.retryMessage', { count: newRetryCount, max: MAX_RETRY_COUNT }));
           await regenerateSongOnly(currentLyrics, newRetryCount);
         } else {
           setStatus('error');
-          setErrorMessage('여러 번 시도했지만 음악 생성에 실패했습니다. 다시 시도해주세요.');
+          setErrorMessage(t('soundStudio.multipleRetryFailed'));
           setRetryCount(0);
         }
       } else {
         setStatus('error');
-        setErrorMessage(error instanceof Error ? error.message : '음악 생성 중 오류가 발생했습니다.');
+        setErrorMessage(error instanceof Error ? error.message : t('soundStudio.musicGenerationError'));
         setRetryCount(0);
       }
     }
@@ -158,7 +160,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
       });
 
       if (!songResponse.success) {
-        throw new Error(songResponse.error_message || '음악 생성 요청에 실패했습니다.');
+        throw new Error(songResponse.error_message || t('soundStudio.songGenerationFailed'));
       }
 
       await resumePolling(songResponse.task_id, songResponse.song_id, currentLyrics, currentRetryCount);
@@ -166,7 +168,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
     } catch (error) {
       console.error('Song regeneration failed:', error);
       setStatus('error');
-      setErrorMessage(error instanceof Error ? error.message : '음악 재생성 중 오류가 발생했습니다.');
+      setErrorMessage(error instanceof Error ? error.message : t('soundStudio.songRegenerationError'));
       setRetryCount(0);
     }
   };
@@ -256,18 +258,18 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
 
   const handleGenerateMusic = async () => {
     if (!businessInfo) {
-      setErrorMessage('비즈니스 정보가 없습니다. 다시 시도해주세요.');
+      setErrorMessage(t('soundStudio.noBusinessInfo'));
       return;
     }
 
     if (!imageTaskId) {
-      setErrorMessage('이미지 업로드 정보가 없습니다. 이전 단계로 돌아가 다시 시도해주세요.');
+      setErrorMessage(t('soundStudio.noImageUploadInfo'));
       return;
     }
 
     setStatus('generating_lyric');
     setErrorMessage(null);
-    setStatusMessage('가사를 생성하고 있습니다...');
+    setStatusMessage(t('soundStudio.generatingLyrics'));
 
     try {
       const language = LANGUAGE_MAP[selectedLang] || 'Korean';
@@ -282,33 +284,33 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
       });
 
       if (!lyricResponse.success || !lyricResponse.task_id) {
-        throw new Error(lyricResponse.error_message || '가사 생성 요청에 실패했습니다.');
+        throw new Error(lyricResponse.error_message || t('soundStudio.lyricGenerationFailed'));
       }
 
       // 2. 가사 생성 상태 폴링 → 완료 시 상세 조회
-      setStatusMessage('가사를 생성하고 있습니다...');
+      setStatusMessage(t('soundStudio.generatingLyrics'));
       const lyricDetailResponse = await waitForLyricComplete(
         lyricResponse.task_id,
         (status: string) => {
           if (status === 'processing') {
-            setStatusMessage('가사를 생성하고 있습니다...');
+            setStatusMessage(t('soundStudio.generatingLyrics'));
           }
         }
       );
 
       if (!lyricDetailResponse.lyric_result) {
-        throw new Error('가사를 받지 못했습니다.');
+        throw new Error(t('soundStudio.lyricNotReceived'));
       }
 
       // "I'm sorry" 체크
       if (lyricDetailResponse.lyric_result.includes("I'm sorry")) {
-        throw new Error('가사 생성에 실패했습니다. 다시 시도해주세요.');
+        throw new Error(t('soundStudio.lyricGenerationError'));
       }
 
       setLyrics(lyricDetailResponse.lyric_result);
 
       setStatus('generating_song');
-      setStatusMessage('노래를 생성하고 있습니다...');
+      setStatusMessage(t('soundStudio.generatingSong'));
 
       const genreMap: Record<string, string> = {
         '자동 선택': 'pop',
@@ -328,7 +330,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
       });
 
       if (!songResponse.success) {
-        throw new Error(songResponse.error_message || '음악 생성 요청에 실패했습니다.');
+        throw new Error(songResponse.error_message || t('soundStudio.songGenerationFailed'));
       }
 
       // 디버깅: songResponse 확인
@@ -337,18 +339,18 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
       console.log('task_id:', songResponse.task_id);
 
       if (!songResponse.song_id) {
-        throw new Error('서버에서 song_id를 받지 못했습니다.');
+        throw new Error(t('soundStudio.songIdMissing'));
       }
 
       setStatus('polling');
-      setStatusMessage('노래를 생성하고 있습니다...');
+      setStatusMessage(t('soundStudio.generatingSong'));
 
       await resumePolling(songResponse.task_id, songResponse.song_id, lyricDetailResponse.lyric_result, 0);
 
     } catch (error) {
       console.error('Music generation failed:', error);
       setStatus('error');
-      setErrorMessage(error instanceof Error ? error.message : '음악 생성 중 오류가 발생했습니다.');
+      setErrorMessage(error instanceof Error ? error.message : t('soundStudio.musicGenerationError'));
       setRetryCount(0);
     }
   };
@@ -378,34 +380,38 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
           <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
             <path d="M15 18l-6-6 6-6" />
           </svg>
-          뒤로가기
+          {t('soundStudio.back')}
         </button>
       </div>
 
       {/* Page Title */}
-      <h1 className="sound-studio-title">사운드 스튜디오</h1>
+      <h1 className="sound-studio-title">{t('soundStudio.title')}</h1>
 
       {/* Main Content - Two Column Layout */}
       <div className="sound-studio-container">
         <div className="sound-studio-columns">
           {/* Left Column - Sound Settings */}
           <div className="sound-column">
-            <h3 className="column-title">사운드</h3>
+            <h3 className="column-title">{t('soundStudio.soundColumn')}</h3>
 
             {/* Sound Type Selection */}
             <div className="sound-studio-section">
-              <label className="input-label">AI 사운드 유형 선택</label>
+              <label className="input-label">{t('soundStudio.soundTypeLabel')}</label>
               <div className="sound-type-grid">
-                {['보컬', '배경음악', '성우 내레이션'].map(type => {
-                  const isDisabled = type === '성우 내레이션' || isGenerating;
+                {[
+                  { key: '보컬', label: t('soundStudio.soundTypeVocal') },
+                  { key: '배경음악', label: t('soundStudio.soundTypeBGM') },
+                  { key: '성우 내레이션', label: t('soundStudio.soundTypeNarration') },
+                ].map(({ key, label }) => {
+                  const isDisabled = key === '성우 내레이션' || isGenerating;
                   return (
                     <button
-                      key={type}
-                      onClick={() => !isDisabled && setSelectedType(type)}
+                      key={key}
+                      onClick={() => !isDisabled && setSelectedType(key)}
                       disabled={isDisabled}
-                      className={`sound-type-btn ${selectedType === type ? 'active' : ''} ${type === '성우 내레이션' ? 'permanently-disabled' : ''}`}
+                      className={`sound-type-btn ${selectedType === key ? 'active' : ''} ${key === '성우 내레이션' ? 'permanently-disabled' : ''}`}
                     >
-                      {type}
+                      {label}
                     </button>
                   );
                 })}
@@ -414,17 +420,21 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
 
             {/* Genre Selection */}
             <div className="sound-studio-section">
-              <label className="input-label">장르 선택</label>
+              <label className="input-label">{t('soundStudio.genreLabel')}</label>
               <div className="genre-grid">
                 <div className="genre-row">
-                  {['자동 선택', 'K-POP', '발라드'].map(genre => (
+                  {[
+                    { key: '자동 선택', label: t('soundStudio.genreAuto') },
+                    { key: 'K-POP', label: 'K-POP' },
+                    { key: '발라드', label: t('soundStudio.genreBallad') },
+                  ].map(({ key, label }) => (
                     <button
-                      key={genre}
-                      onClick={() => setSelectedGenre(genre)}
+                      key={key}
+                      onClick={() => setSelectedGenre(key)}
                       disabled={isGenerating}
-                      className={`genre-btn ${selectedGenre === genre ? 'active' : ''}`}
+                      className={`genre-btn ${selectedGenre === key ? 'active' : ''}`}
                     >
-                      {genre}
+                      {label}
                     </button>
                   ))}
                 </div>
@@ -458,7 +468,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
 
             {/* Language Selection */}
             <div className="sound-studio-section">
-              <label className="input-label">언어</label>
+              <label className="input-label">{t('soundStudio.languageLabel')}</label>
               <div className="language-selector-wrapper" ref={languageDropdownRef}>
                 <button
                   onClick={() => setIsLanguageDropdownOpen(!isLanguageDropdownOpen)}
@@ -499,8 +509,8 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
           {/* Right Column - Lyrics */}
           <div className="lyrics-column">
             <div className="lyrics-header">
-              <h3 className="column-title">가사</h3>
-              <p className="lyrics-subtitle">가사 영역을 선택해서 수정 가능해요</p>
+              <h3 className="column-title">{t('soundStudio.lyricsColumn')}</h3>
+              <p className="lyrics-subtitle">{t('soundStudio.lyricsHint')}</p>
             </div>
 
             {/* Audio Player */}
@@ -545,11 +555,11 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
                   value={lyrics}
                   onChange={(e) => setLyrics(e.target.value)}
                   className="lyrics-textarea"
-                  placeholder="사운드 생성 시 가사 표시됩니다."
+                  placeholder={t('soundStudio.lyricsPlaceholder')}
                 />
               ) : (
                 <div className="lyrics-placeholder">
-                  사운드 생성 시 가사 표시됩니다.
+                  {t('soundStudio.lyricsPlaceholder')}
                 </div>
               )}
             </div>
@@ -568,10 +578,10 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
                 <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" fill="none"/>
                 <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"/>
               </svg>
-              생성 중...
+              {t('soundStudio.generating')}
             </>
           ) : (
-            '사운드 생성'
+            t('soundStudio.generateButton')
           )}
         </button>
 
@@ -607,7 +617,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
         >
           {videoGenerationStatus === 'generating' ? (
             <>
-              <span className="video-gen-text">영상 생성 중</span>
+              <span className="video-gen-text">{t('soundStudio.videoGenerating')}</span>
               <div className="video-gen-progress-bar">
                 <div
                   className="video-gen-progress-fill"
@@ -616,7 +626,7 @@ const SoundStudioContent: React.FC<SoundStudioContentProps> = ({
               </div>
             </>
           ) : (
-            '영상 생성하기'
+            t('soundStudio.generateVideo')
           )}
         </button>
       </div>
diff --git a/src/pages/Dashboard/UrlInputContent.tsx b/src/pages/Dashboard/UrlInputContent.tsx
index d68028e..6026e00 100644
--- a/src/pages/Dashboard/UrlInputContent.tsx
+++ b/src/pages/Dashboard/UrlInputContent.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useRef, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { searchAccommodation, AccommodationSearchItem, AutocompleteRequest } from '../../utils/api';
 import { CrawlingResponse } from '../../types/api';
 
@@ -16,6 +17,7 @@ interface UrlInputContentProps {
 }
 
 const UrlInputContent: React.FC<UrlInputContentProps> = ({ onAnalyze, onAutocomplete, onTestData, error }) => {
+  const { t } = useTranslation();
   const [inputValue, setInputValue] = useState('');
   const [searchType, setSearchType] = useState<SearchType>('url');
   const [isDropdownOpen, setIsDropdownOpen] = useState(false);
@@ -45,19 +47,19 @@ const UrlInputContent: React.FC<UrlInputContentProps> = ({ onAnalyze, onAutocomp
 
   const searchTypeOptions = [
     { value: 'url' as SearchType, label: 'URL' },
-    { value: 'name' as SearchType, label: '업체명' },
+    { value: 'name' as SearchType, label: t('urlInput.searchTypeBusinessName') },
   ];
 
   const getPlaceholder = () => {
     return searchType === 'url'
       ? 'https://www.castad.com'
-      : '업체명을 입력하세요';
+      : t('urlInput.placeholderBusinessName');
   };
 
   const getGuideText = () => {
     return searchType === 'url'
-      ? 'URL에서 가져온 정보로 영상이 자동 생성됩니다.'
-      : '업체명으로 검색하여 정보를 가져옵니다.';
+      ? t('urlInput.guideUrl')
+      : t('urlInput.guideBusinessName');
   };
 
   // 업체명 검색 시 자동완성 (디바운스 적용)
@@ -222,7 +224,7 @@ const UrlInputContent: React.FC<UrlInputContentProps> = ({ onAnalyze, onAutocomp
               {showAutocomplete && searchType === 'name' && (
                 <div className="url-input-autocomplete-dropdown">
                   {isAutocompleteLoading ? (
-                    <div className="url-input-autocomplete-loading">검색 중...</div>
+                    <div className="url-input-autocomplete-loading">{t('urlInput.searching')}</div>
                   ) : (
                     autocompleteResults.map((item, index) => (
                       <button
@@ -245,7 +247,7 @@ const UrlInputContent: React.FC<UrlInputContentProps> = ({ onAnalyze, onAutocomp
 
             {/* 검색 버튼 */}
             <button type="submit" className="url-input-button">
-              검색하기
+              {t('urlInput.searchButton')}
             </button>
           </div>
 
@@ -268,7 +270,7 @@ const UrlInputContent: React.FC<UrlInputContentProps> = ({ onAnalyze, onAutocomp
           disabled={isLoadingTest}
           className="test-data-button"
         >
-          {isLoadingTest ? '로딩 중...' : '테스트 데이터'}
+          {isLoadingTest ? t('urlInput.testDataLoading') : t('urlInput.testData')}
         </button>
       )}
     </div>
diff --git a/src/pages/Landing/DisplaySection.tsx b/src/pages/Landing/DisplaySection.tsx
index 2c4128e..3cf0c50 100755
--- a/src/pages/Landing/DisplaySection.tsx
+++ b/src/pages/Landing/DisplaySection.tsx
@@ -1,5 +1,6 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 import Footer from '../../components/Footer';
 
 interface DisplaySectionProps {
@@ -7,6 +8,7 @@ interface DisplaySectionProps {
 }
 
 const DisplaySection: React.FC<DisplaySectionProps> = ({ onStartClick }) => {
+  const { t } = useTranslation();
   // YouTube Shorts 영상 ID들
   const videos = [
     { id: 1, videoId: 'OZJ8X4P82OA' },
@@ -38,7 +40,7 @@ const DisplaySection: React.FC<DisplaySectionProps> = ({ onStartClick }) => {
 
         {/* Action Button */}
         <button onClick={onStartClick} className="display-button">
-          시작하기
+          {t('landing.display.startButton')}
         </button>
       </div>
       <Footer />
diff --git a/src/pages/Landing/HeroSection.tsx b/src/pages/Landing/HeroSection.tsx
index 8d19d81..3db9198 100755
--- a/src/pages/Landing/HeroSection.tsx
+++ b/src/pages/Landing/HeroSection.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect, useRef, useCallback } from 'react';
+import { useTranslation } from 'react-i18next';
 import { searchAccommodation, AccommodationSearchItem, AutocompleteRequest } from '../../utils/api';
 import { CrawlingResponse } from '../../types/api';
 
@@ -57,6 +58,7 @@ const orbConfigs: OrbConfig[] = [
 ];
 
 const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, onTestData, onNext, error: externalError, scrollProgress = 0 }) => {
+  const { t } = useTranslation();
   const [inputValue, setInputValue] = useState('');
   const [searchType, setSearchType] = useState<SearchType>('url');
   const [isDropdownOpen, setIsDropdownOpen] = useState(false);
@@ -73,7 +75,7 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
       onTestData(data);
     } catch (error) {
       console.error('테스트 데이터 로드 실패:', error);
-      setLocalError('테스트 데이터를 불러오는데 실패했습니다.');
+      setLocalError(t('landing.hero.testDataLoadFailed'));
     } finally {
       setIsLoadingTest(false);
     }
@@ -92,7 +94,7 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
 
   const searchTypeOptions = [
     { value: 'url' as SearchType, label: 'URL' },
-    { value: 'name' as SearchType, label: '업체명' },
+    { value: 'name' as SearchType, label: t('landing.hero.searchTypeBusinessName') },
   ];
 
   // 드롭다운 외부 클릭 감지
@@ -258,23 +260,23 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
   const getPlaceholder = () => {
     return searchType === 'url'
       ? 'https://www.castad.com'
-      : '업체명을 입력하세요';
+      : t('landing.hero.placeholderBusinessName');
   };
 
   const getGuideText = () => {
     return searchType === 'url'
-      ? 'URL에서 가져온 정보로 영상이 자동 생성됩니다.'
-      : '업체명으로 검색하여 정보를 가져옵니다.';
+      ? t('landing.hero.guideUrl')
+      : t('landing.hero.guideBusinessName');
   };
 
   const handleStart = () => {
     if (!inputValue.trim()) {
-      setLocalError(searchType === 'url' ? 'URL을 입력해주세요.' : '업체명을 입력해주세요.');
+      setLocalError(searchType === 'url' ? t('landing.hero.errorUrlRequired') : t('landing.hero.errorNameRequired'));
       return;
     }
 
     if (searchType === 'url' && !isValidUrl(inputValue.trim())) {
-      setLocalError('올바른 URL 형식이 아닙니다. (예: https://example.com)');
+      setLocalError(t('landing.hero.errorInvalidUrl'));
       return;
     }
 
@@ -404,7 +406,7 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
               {showAutocomplete && searchType === 'name' && (
                 <div className="hero-autocomplete-dropdown">
                   {isAutocompleteLoading ? (
-                    <div className="hero-autocomplete-loading">검색 중...</div>
+                    <div className="hero-autocomplete-loading">{t('landing.hero.searching')}</div>
                   ) : (
                     autocompleteResults.map((item, index) => (
                       <button
@@ -446,14 +448,14 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
           )}
 
           <button onClick={handleStart} className="hero-button">
-            브랜드 분석
+            {t('landing.hero.analyzeButton')}
           </button>
         </div>
       </div>
 
       {/* Footer Indicator */}
       <button onClick={onNext} className="scroll-indicator">
-        <span className="scroll-indicator-text">스크롤하여 더 보기</span>
+        <span className="scroll-indicator-text">{t('landing.hero.scrollMore')}</span>
         <div className="scroll-indicator-icon">
           <svg
             width="24"
@@ -477,7 +479,7 @@ const HeroSection: React.FC<HeroSectionProps> = ({ onAnalyze, onAutocomplete, on
           disabled={isLoadingTest}
           className="test-data-button"
         >
-          {isLoadingTest ? '로딩 중...' : '테스트 데이터'}
+          {isLoadingTest ? t('landing.hero.testDataLoading') : t('landing.hero.testData')}
         </button>
       )}
     </div>
diff --git a/src/pages/Landing/WelcomeSection.tsx b/src/pages/Landing/WelcomeSection.tsx
index a68b438..46850e9 100755
--- a/src/pages/Landing/WelcomeSection.tsx
+++ b/src/pages/Landing/WelcomeSection.tsx
@@ -1,5 +1,6 @@
 
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 interface WelcomeSectionProps {
   onStartClick?: () => void;
@@ -7,25 +8,26 @@ interface WelcomeSectionProps {
 }
 
 const WelcomeSection: React.FC<WelcomeSectionProps> = () => {
+  const { t } = useTranslation();
   const features = [
     {
       id: 1,
-      title: '비즈니스 핵심 정보 분석',
-      description: '홈페이지, 네이버 지도, 블로그 등의\nURL을 입력하세요',
+      title: t('landing.welcome.feature1Title'),
+      description: t('landing.welcome.feature1Desc'),
       iconBg: '#9BCACC',
       icon: '/assets/images/icon-analysis.svg'
     },
     {
       id: 2,
-      title: '홍보 콘텐츠 자동 제작',
-      description: '분석된 정보를 바탕으로\n비즈니스에 맞는 음악, 자막, 노래, 영상을\n자동으로 제작해요',
+      title: t('landing.welcome.feature2Title'),
+      description: t('landing.welcome.feature2Desc'),
       iconBg: '#DFC7FD',
       icon: '/assets/images/icon-content.svg'
     },
     {
       id: 3,
-      title: '멀티채널 자동 배포',
-      description: '완성된 영상은 다운로드하거나\n바로 SNS에 업로드 할 수 있어요',
+      title: t('landing.welcome.feature3Title'),
+      description: t('landing.welcome.feature3Desc'),
       iconBg: '#D4FDF3',
       icon: '/assets/images/icon-deploy.svg'
     },
@@ -41,8 +43,8 @@ const WelcomeSection: React.FC<WelcomeSectionProps> = () => {
 
         {/* Header */}
         <div className="welcome-header">
-          <h2 className="welcome-title">ADO2.AI에 오신 것을 환영합니다.</h2>
-          <p className="welcome-subtitle">분석, 제작, 배포까지 콘텐츠 마케팅의 전과정을 자동화</p>
+          <h2 className="welcome-title">{t('landing.welcome.title')}</h2>
+          <p className="welcome-subtitle">{t('landing.welcome.subtitle')}</p>
         </div>
 
         {/* Feature Cards */}
diff --git a/src/pages/Login/LoginSection.tsx b/src/pages/Login/LoginSection.tsx
index d6acdd9..5a1a64c 100755
--- a/src/pages/Login/LoginSection.tsx
+++ b/src/pages/Login/LoginSection.tsx
@@ -1,5 +1,6 @@
 
 import React, { useState, useEffect } from 'react';
+import { useTranslation } from 'react-i18next';
 import { getKakaoLoginUrl, kakaoCallback } from '../../utils/api';
 
 interface LoginSectionProps {
@@ -8,6 +9,7 @@ interface LoginSectionProps {
 }
 
 const LoginSection: React.FC<LoginSectionProps> = ({ onBack, onLogin }) => {
+  const { t } = useTranslation();
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
@@ -37,7 +39,7 @@ const LoginSection: React.FC<LoginSectionProps> = ({ onBack, onLogin }) => {
       onLogin();
     } catch (err) {
       console.error('Kakao callback failed:', err);
-      setError('카카오 로그인에 실패했습니다. 다시 시도해주세요.');
+      setError(t('login.kakaoLoginFailed'));
 
       // URL에서 code 파라미터 제거
       const url = new URL(window.location.href);
@@ -59,7 +61,7 @@ const LoginSection: React.FC<LoginSectionProps> = ({ onBack, onLogin }) => {
       window.location.href = response.auth_url;
     } catch (err) {
       console.error('Failed to get Kakao login URL:', err);
-      setError('로그인 URL을 가져오는데 실패했습니다. 다시 시도해주세요.');
+      setError(t('login.loginUrlFailed'));
       setIsLoading(false);
     }
   };
@@ -69,7 +71,7 @@ const LoginSection: React.FC<LoginSectionProps> = ({ onBack, onLogin }) => {
       {/* Back Button */}
       <button onClick={onBack} className="login-back-btn" disabled={isLoading}>
         <img src="/assets/images/icon-back.svg" alt="Back" />
-        <span>뒤로가기</span>
+        <span>{t('login.back')}</span>
       </button>
 
       <div className="login-content">
@@ -91,7 +93,7 @@ const LoginSection: React.FC<LoginSectionProps> = ({ onBack, onLogin }) => {
           className="btn-kakao"
           disabled={isLoading}
         >
-          {isLoading ? '로그인 중...' : '카카오로 시작하기'}
+          {isLoading ? t('login.loggingIn') : t('login.kakaoStart')}
         </button>
       </div>
     </div>