diff --git a/app/pages/[d1]/[d2]/index.vue b/app/pages/[d1]/[d2]/index.vue
index dceae28..9013128 100644
--- a/app/pages/[d1]/[d2]/index.vue
+++ b/app/pages/[d1]/[d2]/index.vue
@@ -4,6 +4,7 @@ import { getLayoutType } from '#layers/utils/dataUtil'
 
 const pageDataStore = usePageDataStore()
 const { pageData } = storeToRefs(pageDataStore)
+console.log("🚀 d2 index ~ pageData:", pageData)
 
 const currentLayout = computed(() => getLayoutType(pageData.value))
 
diff --git a/layers/components/blocks/LanguageSwitcher.vue b/layers/components/blocks/LanguageSwitcher.vue
index da81a41..245d386 100644
--- a/layers/components/blocks/LanguageSwitcher.vue
+++ b/layers/components/blocks/LanguageSwitcher.vue
@@ -2,7 +2,9 @@
   <div class="bg-white">
     <select
       v-model="selectedLocale"
+      :disabled="isChanging"
       class="text-black px-2 py-1 rounded-md"
+      :class="{ 'opacity-50 cursor-not-allowed': isChanging }"
       @change="switchLanguage"
     >
       <option
@@ -13,6 +15,9 @@
         {{ localeOption }}
       </option>
     </select>
+    <span v-if="isChanging" class="ml-2 text-sm text-gray-500">
+      변경 중...
+    </span>
   </div>
 </template>
 
@@ -24,24 +29,40 @@ const availableLanguages = computed(() => {
   return gameDataStore.gameData?.lang_codes || ['ko']
 })
 
-const { locale } = useI18n()
+const { locale, setLocale } = useI18n()
 const switchLocalePath = useSwitchLocalePath()
 const router = useRouter()
+const pageDataStore = usePageDataStore()
 
 const selectedLocale = ref(locale.value)
+const isChanging = ref(false)
 
-// 언어 변경 함수
+// 언어 변경 함수 (CSR 방식)
 const switchLanguage = async () => {
-  console.log(
-    '🚀 ~ switchLanguage ~ selectedLocale.value:',
-    selectedLocale.value
-  )
-  if (selectedLocale.value) {
+  if (!selectedLocale.value || isChanging.value) return
+  
+  isChanging.value = true
+  
+  try {
     // URL 경로를 통해 언어 변경
     const path = switchLocalePath(selectedLocale.value)
     if (path) {
-      await router.push(path)
+      // 페이지 데이터 초기화 (새로운 언어로 다시 로드되도록)
+      pageDataStore.clearPageData()
+      
+      // 언어 변경 및 라우팅
+      await setLocale(selectedLocale.value)
+      // await router.push(path)
+      
+      // 페이지 새로고침을 통해 데이터 재로드 보장
+      await nextTick()
+      window.location.reload()
     }
+  } catch {
+    // 오류 발생 시 이전 언어로 복원
+    selectedLocale.value = locale.value
+  } finally {
+    isChanging.value = false
   }
 }
 
diff --git a/layers/composables/useGetGameAlias.ts b/layers/composables/useGetGameAlias.ts
index 55c6c46..20d3cd4 100644
--- a/layers/composables/useGetGameAlias.ts
+++ b/layers/composables/useGetGameAlias.ts
@@ -12,7 +12,7 @@ const extractGameAliasFromHost = (host: string, baseDomain: string): string => {
     return ''
   }
 
-  const subdomain = host.split('.')[0]
+  const subdomain = host.split(':')[0]
   return subdomain && subdomain !== 'www' ? subdomain : ''
 }
 
diff --git a/layers/composables/usePathResolver.ts b/layers/composables/usePathResolver.ts
index 2b3707d..c5122a4 100644
--- a/layers/composables/usePathResolver.ts
+++ b/layers/composables/usePathResolver.ts
@@ -7,16 +7,18 @@ export const usePathResolver = () => {
     // URL에서 언어 코드 패턴을 찾아서 그 뒤의 경로를 추출
     // 예: /ko/about/story -> /about/story
     // 예: /en/test/page -> /test/page
+    // 예: /zh-tw/about/story -> /about/story
+    // 예: /zh-cn/test/page -> /test/page
     // 예: /ko -> "" (빈 문자열)
-    const languagePattern = /^\/[a-z]{2}\/(.+)$/
+    const languagePattern = /^\/[a-z]{2}(-[a-z]{2})?\/(.+)$/
     const match = targetUrl.match(languagePattern)
 
-    if (match && match[1]) {
-      return `/${match[1]}`
+    if (match && match[2]) {
+      return `/${match[2]}`
     }
 
-    // 언어 코드만 있고 뒤에 아무것도 없는 경우 (예: /ko, /en)
-    const languageOnlyPattern = /^\/[a-z]{2}$/
+    // 언어 코드만 있고 뒤에 아무것도 없는 경우 (예: /ko, /en, /zh-tw, /zh-cn)
+    const languageOnlyPattern = /^\/[a-z]{2}(-[a-z]{2})?$/
     if (languageOnlyPattern.test(targetUrl)) {
       return ''
     }
diff --git a/layers/layouts/promotion.vue b/layers/layouts/promotion.vue
index 674bc39..add72a8 100644
--- a/layers/layouts/promotion.vue
+++ b/layers/layouts/promotion.vue
@@ -1,4 +1,6 @@
-<script setup lang="ts"></script>
+<script setup lang="ts">
+console.log("🚀 ~ promotion 22222222")
+</script>
 
 <template>
   <div class="promotion-wrap">
diff --git a/layers/middleware/pageData.global.ts b/layers/middleware/pageData.global.ts
index 0fcded0..0c05f89 100644
--- a/layers/middleware/pageData.global.ts
+++ b/layers/middleware/pageData.global.ts
@@ -9,24 +9,28 @@ export default defineNuxtRouteMiddleware(async (to, _from) => {
   const store = usePageDataStore()
   const gameAlias = useGetGameAlias()
   const { getPathAfterLanguage } = usePathResolver()
+  const headers = useRequestHeaders()
+  const langCode = ssrGetFinalLocale(to.path, headers)
 
   const stoveApiBaseUrl = config.public.stoveApiUrl
   const apiUrl = `${stoveApiBaseUrl}/pub-comm/v2.0/template/page`
 
   try {
     const pageUrl = getPathAfterLanguage(to.path)
+    console.log("🚀 ~ pageUrl:", pageUrl)
 
     // pageUrl이 빈값이거나 null이면 /brand로 리다이렉트
     if (!pageUrl || pageUrl === '' || pageUrl === '/') {
-      return navigateTo('/brand', { replace: true })
+      return navigateTo(`/${langCode}/brand`, { replace: true })
     }
 
     const queryParams: Record<string, string> = {
-      game_alias: gameAlias,
-      lang_code: 'ko',
+      game_domain: gameAlias,
+      lang_code: langCode,
       page_url: pageUrl,
       _t: Date.now().toString(), // 캐시 무효화를 위한 타임스탬프
     }
+    console.log("🚀 ~ queryParams:", queryParams)
 
     const response = (await commonFetch('GET', apiUrl, {
       query: queryParams,
diff --git a/layers/server/middleware/gameInfo.ts b/layers/server/middleware/gameInfo.ts
index 572f25a..3377677 100644
--- a/layers/server/middleware/gameInfo.ts
+++ b/layers/server/middleware/gameInfo.ts
@@ -5,6 +5,8 @@ import {
   getRequestURL,
 } from 'h3'
 
+import { ssrGetFinalLocale } from '../../utils/localeUtil'
+
 export default defineEventHandler(async event => {
   const url = getRequestURL(event)
 
@@ -25,7 +27,7 @@ export default defineEventHandler(async event => {
   const isGameAliasExtractable = host.includes(baseDomain)
 
   if (isGameAliasExtractable) {
-    const gameAlias = host.split('.')[0]
+    const gameAlias = host.split(':')[0]
 
     if (gameAlias && gameAlias !== 'www') {
       event.context.gameAlias = gameAlias
@@ -38,21 +40,23 @@ export default defineEventHandler(async event => {
     const stoveApiBaseUrl = config.public.stoveApiUrl
     const apiUrl = `${stoveApiBaseUrl}/pub-comm/v1.0/template/game`
 
+
+    const langCode = ssrGetFinalLocale(event?.node.req.url, event.node.req.headers)
+
     // URL의 첫 번째 path를 lang_code로 사용 (파비콘, API 경로 제외)
-    const url = getRequestURL(event)
-    const pathSegments = url.pathname
-      .split('/')
-      .filter(
-        segment =>
-          segment &&
-          !segment.includes('favicon') &&
-          !segment.includes('api') &&
-          !segment.startsWith('_')
-      )
-    const langCode = pathSegments[0] || 'ko'
+    // const pathSegments = url.pathname
+    //   .split('/')
+    //   .filter(
+    //     segment =>
+    //       segment &&
+    //       !segment.includes('favicon') &&
+    //       !segment.includes('api') &&
+    //       !segment.startsWith('_')
+    //   )
+    // const langCode = pathSegments[0] || 'ko'
 
     const queryParams: Record<string, string> = {
-      game_alias: event.context.gameAlias || '',
+      game_domain: event.context.gameAlias || '',
       lang_code: langCode,
     }
 
diff --git a/layers/stores/useGameDataStore.ts b/layers/stores/useGameDataStore.ts
index 6492234..f22bbfe 100644
--- a/layers/stores/useGameDataStore.ts
+++ b/layers/stores/useGameDataStore.ts
@@ -2,18 +2,25 @@ import type { GameDataValue } from '#layers/types/api/gameData'
 
 export const useGameDataStore = defineStore('gameData', () => {
   const gameData = ref<GameDataValue | null>(null)
+  const langCode = ref<string | null>(null)
 
   const setGameData = (data: GameDataValue) => {
     gameData.value = data
   }
 
+  const setLangCode = (data: string) => {
+    langCode.value = data
+  }
+
   const clearGameData = () => {
     gameData.value = null
   }
 
   return {
+    langCode,
     gameData,
     setGameData,
+    setLangCode,
     clearGameData,
   }
 })
diff --git a/layers/utils/dataUtil.ts b/layers/utils/dataUtil.ts
index a5bdc6e..4dfae87 100644
--- a/layers/utils/dataUtil.ts
+++ b/layers/utils/dataUtil.ts
@@ -10,7 +10,6 @@ export const getLayoutType = (
   return pageData?.page_type === 1 ? 'default' : 'promotion'
 }
 
-// 이미지 호스트 리턴하는 함수
 // [TODO] 환경변수 처리 수정
 export const getResolvedHost = (path: string): string => {
   const config = useRuntimeConfig()
diff --git a/layers/utils/localeUtil.ts b/layers/utils/localeUtil.ts
new file mode 100644
index 0000000..7272e7d
--- /dev/null
+++ b/layers/utils/localeUtil.ts
@@ -0,0 +1,166 @@
+import { DEFAULT_LOCALE_CODE, DEFAULT_COVERAGES } from '@/i18n.config'
+
+// 사용자 선호 언어 가져오기
+export const getPreferredLanguage = (acceptLanguageHeader = '') => {
+  const languages = acceptLanguageHeader
+    .split(',')
+    .map((lang) => {
+      const [code, priority = 'q=1'] = lang.trim().split(';q=')
+      return { code, priority: parseFloat(priority) }
+    })
+    .sort((a, b) => b.priority - a.priority)
+
+  return languages.length > 0 ? languages[0].code : null
+}
+
+export const getFinalLanguage = (path = '', defaultLocale: string, coverages: string[]) => {
+  // const nuxtApp = useNuxtApp()
+  let finalLocale = ''
+  let requestedLocale
+  let acceptLanguage: string
+  let defaultLang = 'en'
+  let defaultLangEn: string
+  if (defaultLocale) {
+    defaultLangEn = defaultLocale
+  } else {
+    defaultLangEn = 'en'
+  }
+
+  requestedLocale = path?.split('/')[1]?.toLowerCase() ?? 'undefined'
+
+  if (import.meta.server) {
+    const headers = useRequestHeaders(['accept-language'])
+    acceptLanguage = headers['accept-language'] || defaultLangEn
+
+    defaultLang =
+      coverages.find((locale: string) => getPreferredLanguage(acceptLanguage)?.startsWith(locale)) || defaultLangEn
+  }
+
+  // const DEFAULT_COVERAGES = i18n.locales.map((locale) => locale.code)
+  const DEFAULT_COVERAGES = coverages
+  const requestedPage = path?.split('/')[2]?.toLowerCase() ?? undefined
+
+  const localeMap: Record<string, string> = {
+    'zh-tw': 'zh-TW',
+    'zh-cn': 'zh-CN'
+  }
+
+  if (localeMap[requestedLocale]) {
+    requestedLocale = localeMap[requestedLocale]
+  }
+
+  if (requestedLocale !== undefined && DEFAULT_COVERAGES.includes(requestedLocale)) {
+    finalLocale = requestedLocale
+  } else if (
+    requestedLocale === undefined ||
+    requestedLocale === '' ||
+    path !== '' ||
+    (requestedLocale !== undefined && !DEFAULT_COVERAGES.includes(requestedLocale) && requestedPage !== undefined)
+  ) {
+    // 요청된 언어가 없을 때 or 잘못된 언어코드로 요청 시 브라우저 언어로 설정
+    finalLocale = defaultLang
+  } else {
+    // 그 외의 경우 기본 언어로 설정 (중국어 번체)
+    finalLocale = defaultLangEn
+  }
+
+  return finalLocale.toLowerCase()
+}
+
+/**
+ * 우선순위에 따른 언어 조회 (CSR)
+ *
+ * @param {string} path - 현재 URL 경로
+ */
+export const csrGetFinalLocale = (path = '') => {
+  let finalLocale = DEFAULT_LOCALE_CODE // 기본값 설정
+  const localeMap: Record<string, string> = {
+    'zh-tw': 'zh-TW',
+    'zh-cn': 'zh-CN'
+  }
+
+  // 1. URL 패스에 포함된 언어
+  if (path && path !== '' && path.split('/').length > 1) {
+    const pathLocal = path.split('/')[1]
+
+    // URL 패스에 포함된 언어가 지원하는 언어인지 체크
+    if (pathLocal && pathLocal !== '' && DEFAULT_COVERAGES.includes(pathLocal)) {
+      finalLocale = pathLocal // .toLowerCase()
+
+      if (localeMap[pathLocal]) {
+        finalLocale = localeMap[pathLocal]
+      }
+    }
+    return finalLocale
+  }
+
+  // 2. 브라우저 언어
+  const browserLanguage = navigator.language || navigator.languages[0]
+  if (browserLanguage && browserLanguage !== '' && DEFAULT_COVERAGES.includes(browserLanguage)) {
+    finalLocale = browserLanguage // .toLowerCase()
+    if (localeMap[browserLanguage]) {
+      finalLocale = localeMap[browserLanguage]
+    }
+    return finalLocale
+  }
+
+  // 3. 서비스 기본 언어
+  finalLocale = DEFAULT_LOCALE_CODE
+
+  return finalLocale
+}
+
+/**
+ * 우선순위에 따른 언어 조회 (SSR)
+ *
+ * @param {string} path - 현재 URL 경로
+ * @param {any} headers - 요청 헤더
+ */
+export const ssrGetFinalLocale = (path = '', headers: any) => {
+  let finalLocale = DEFAULT_LOCALE_CODE // 기본값 설정
+
+
+  try {
+    // 1. URL path에 포함된 언어 정보
+    if (path && path !== '' && path.split('/').length > 1) {
+      const pathLocale = path.split('/')[1]
+
+      // URL path에 포함된 언어 정보가 지원하는 언어인지 체크
+      if (pathLocale && pathLocale !== '' && DEFAULT_COVERAGES.includes(pathLocale)) {
+        finalLocale = pathLocale // .toLowerCase()
+    
+        return finalLocale
+      }
+    }
+
+    // 2. 요청 헤더의 브라우저 언어 (accept-language)
+    if (headers && headers['accept-language']) {
+      const acceptLanguage = Array.isArray(headers['accept-language'])
+        ? headers['accept-language'][0]
+        : headers['accept-language']
+
+      if (acceptLanguage && typeof acceptLanguage === 'string') {
+        const preferredLocale = getPreferredLanguage(acceptLanguage)
+        if (preferredLocale) {
+          // 선호 언어의 기본 코드와 일치하는 지원 로케일 찾기
+          const matchedLocale = DEFAULT_COVERAGES.find((locale: string) =>
+            preferredLocale.toLowerCase().startsWith(locale.toLowerCase())
+          )
+          if (matchedLocale) {
+            finalLocale = matchedLocale
+            // return matchedLocale.toLowerCase()
+        
+            return finalLocale
+          }
+        }
+      }
+    }
+
+    // 3. 서비스 기본 언어
+    finalLocale = DEFAULT_LOCALE_CODE
+  } catch (e) {
+    console.error('[Exception] localeUtil.ssrGetFinalLocale: ', e)
+    finalLocale = DEFAULT_LOCALE_CODE
+  }
+  return finalLocale
+}