diff --git a/e2e/app.spec.ts b/e2e/app.spec.ts
index 81f80a4..d8907e1 100644
--- a/e2e/app.spec.ts
+++ b/e2e/app.spec.ts
@@ -161,7 +161,7 @@ test.describe('Core User Flows', () => {
     await expect(page.getByRole('button', { name: /crear nuevo juego|create new game/i })).toBeVisible()
   })
 
-  test('should support multiple languages including German and Dutch', async ({ page }) => {
+  test('should support multiple languages including Korean, German, and Dutch', async ({ page }) => {
     await page.goto('/')
     
     // Verify language toggle is available (use aria-haspopup to target dropdown trigger specifically)
@@ -169,7 +169,7 @@ test.describe('Core User Flows', () => {
     await expect(languageButton).toBeVisible()
     
     // Verify welcome description is visible (use paragraph element to avoid matching button text)
-    const welcomeDesc = page.locator('p').getByText(/organize|organiza|organisez|organizza|ギフト|轻松|organisieren|organiseer/i)
+    const welcomeDesc = page.locator('p').getByText(/organize|organiza|organisez|organizza|ギフト|쉽고 재미있게|轻松|organisieren|organiseer/i)
     await expect(welcomeDesc).toBeVisible()
   })
 
@@ -201,6 +201,13 @@ test.describe('Core User Flows', () => {
     await enPage.goto('/?lang=en')
     await expect(enPage.getByRole('button', { name: /create new game/i })).toBeVisible()
     await enContext.close()
+
+    // Test Korean
+    const koContext = await browser.newContext()
+    const koPage = await koContext.newPage()
+    await koPage.goto('/?lang=ko')
+    await expect(koPage.getByRole('button', { name: /새 게임 만들기/i })).toBeVisible()
+    await koContext.close()
   })
 
   test('should navigate directly to guide pages via URL parameter', async ({ page }) => {
diff --git a/src/lib/api.ts b/src/lib/api.ts
index 05b4500..4fc196d 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -80,7 +80,7 @@ export interface CreateGameData {
   organizerEmail?: string
   participants: Array<{ name: string; email?: string; desiredGift: string; wish: string }>
   sendEmails?: boolean
-  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 }
 
 export interface CreateGameResponse extends Game {
@@ -128,7 +128,7 @@ export async function updateGameAPI(
   code: string,
   action: 'requestReassignment',
   participantId: string,
-  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 ): Promise<Game> {
   const response = await fetch(`${API_BASE_URL}/games/${code}`, {
     method: 'PATCH',
@@ -244,7 +244,7 @@ export async function updateWishAPI(
   code: string,
   participantId: string,
   wish: string,
-  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 ): Promise<Game> {
   const response = await fetch(`${API_BASE_URL}/games/${code}`, {
     method: 'PATCH',
@@ -271,7 +271,7 @@ export async function updateParticipantEmailAPI(
   code: string,
   participantId: string,
   email: string,
-  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 ): Promise<Game> {
   const response = await fetch(`${API_BASE_URL}/games/${code}`, {
     method: 'PATCH',
@@ -332,7 +332,7 @@ export async function updateParticipantDetailsAPI(
 export async function confirmAssignmentAPI(
   code: string,
   participantId: string,
-  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+  language?: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 ): Promise<Game> {
   const response = await fetch(`${API_BASE_URL}/games/${code}`, {
     method: 'PATCH',
@@ -546,7 +546,7 @@ export interface SendEmailResponse {
 export async function sendOrganizerEmailAPI(
   code: string,
   organizerToken: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es'
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es'
 ): Promise<SendEmailResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
     method: 'POST',
@@ -598,7 +598,7 @@ export async function sendParticipantEmailAPI(
 export async function sendAllParticipantEmailsAPI(
   code: string,
   organizerToken: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es'
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es'
 ): Promise<SendEmailResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
     method: 'POST',
@@ -625,7 +625,7 @@ export async function sendReminderEmailAPI(
   code: string,
   organizerToken: string,
   participantId: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es',
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es',
   customMessage?: string
 ): Promise<SendEmailResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
@@ -654,7 +654,7 @@ export async function sendReminderEmailAPI(
 export async function sendReminderToAllAPI(
   code: string,
   organizerToken: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es',
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es',
   customMessage?: string
 ): Promise<SendEmailResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
@@ -716,7 +716,7 @@ export interface RecoverOrganizerLinkResponse {
 export async function recoverOrganizerLinkAPI(
   code: string,
   email: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es'
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es'
 ): Promise<RecoverOrganizerLinkResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
     method: 'POST',
@@ -750,7 +750,7 @@ export async function recoverOrganizerLinkAPI(
 export async function recoverParticipantLinkAPI(
   code: string,
   email: string,
-  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl' = 'es'
+  language: 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl' = 'es'
 ): Promise<RecoverOrganizerLinkResponse> {
   const response = await fetch(`${API_BASE_URL}/email/send`, {
     method: 'POST',
diff --git a/src/lib/translations/README.md b/src/lib/translations/README.md
index fc81dd6..c19c672 100644
--- a/src/lib/translations/README.md
+++ b/src/lib/translations/README.md
@@ -12,6 +12,7 @@ Each language has its own file:
 - `fr.ts` - French (Français)
 - `it.ts` - Italian (Italiano)
 - `ja.ts` - Japanese (日本語)
+- `ko.ts` - Korean (한국어)
 - `zh.ts` - Chinese (中文)
 - `de.ts` - German (Deutsch)
 - `nl.ts` - Dutch (Nederlands)
diff --git a/src/lib/translations/index.ts b/src/lib/translations/index.ts
index 7572df1..1bb4052 100644
--- a/src/lib/translations/index.ts
+++ b/src/lib/translations/index.ts
@@ -4,6 +4,7 @@ import { pt } from './pt'
 import { fr } from './fr'
 import { it } from './it'
 import { ja } from './ja'
+import { ko } from './ko'
 import { zh } from './zh'
 import { de } from './de'
 import { nl } from './nl'
@@ -15,6 +16,7 @@ export const translations = {
   fr,
   it,
   ja,
+  ko,
   zh,
   de,
   nl
diff --git a/src/lib/translations/ko.ts b/src/lib/translations/ko.ts
new file mode 100644
index 0000000..c0642c9
--- /dev/null
+++ b/src/lib/translations/ko.ts
@@ -0,0 +1,26 @@
+import { en } from './en'
+
+export const ko = {
+  ...en,
+  appName: 'Zava 선물 교환',
+  welcome: '환영합니다!',
+  welcomeDesc: '쉽고 재미있게 선물 교환을 준비하세요',
+  createGame: '새 게임 만들기',
+  joinGame: '게임 참가하기',
+  enterCode: '코드를 입력하세요',
+  codePlaceholder: '6자리 코드',
+  continue: '계속',
+  back: '뒤로',
+  next: '다음',
+  finish: '완료',
+  cancel: '취소',
+  confirm: '확인',
+  language: '언어',
+  darkMode: '다크 모드',
+  lightMode: '라이트 모드',
+  privacyLink: '개인정보 처리방침',
+  guideOrganizerLink: '주최자 가이드',
+  guideParticipantLink: '참가자 가이드',
+  guideOrganizerTitle: '주최자 가이드',
+  guideParticipantTitle: '참가자 가이드'
+}
diff --git a/src/lib/types.ts b/src/lib/types.ts
index d457918..8e08782 100644
--- a/src/lib/types.ts
+++ b/src/lib/types.ts
@@ -80,7 +80,7 @@ export interface Game {
   archivedAt?: number // Unix timestamp in milliseconds since epoch when the game was archived (Date.now())
 }
 
-export type Language = 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'zh' | 'de' | 'nl'
+export type Language = 'en' | 'es' | 'pt' | 'fr' | 'it' | 'ja' | 'ko' | 'zh' | 'de' | 'nl'
 
 export interface LanguageOption {
   code: Language
@@ -96,6 +96,7 @@ export const LANGUAGES: LanguageOption[] = [
   { code: 'fr', name: 'French', nativeName: 'Français', flag: '🇫🇷' },
   { code: 'it', name: 'Italian', nativeName: 'Italiano', flag: '🇮🇹' },
   { code: 'ja', name: 'Japanese', nativeName: '日本語', flag: '🇯🇵' },
+  { code: 'ko', name: 'Korean', nativeName: '한국어', flag: '🇰🇷' },
   { code: 'zh', name: 'Chinese', nativeName: '中文', flag: '🇨🇳' },
   { code: 'de', name: 'German', nativeName: 'Deutsch', flag: '🇩🇪' },
   { code: 'nl', name: 'Dutch', nativeName: 'Nederlands', flag: '🇳🇱' },