diff --git a/app/app.vue b/app/app.vue
index 49cf6f2..b52521e 100644
--- a/app/app.vue
+++ b/app/app.vue
@@ -1,13 +1,9 @@
 <script setup lang="ts">
-import { useNuxtApp } from 'nuxt/app'
-
-const nuxtApp = useNuxtApp()
 const { locale } = useI18n()
 const gameDataStore = useGameDataStore()
 const modalStore = useModalStore()
 const scrollStore = useScrollStore()
 
-const { setGameData } = gameDataStore
 const { confirm, alert } = modalStore
 const {
   gameName,
@@ -95,13 +91,6 @@ const setupGameHead = () => {
   }
 }
 
-if (import.meta.server) {
-  const gameData = nuxtApp.ssrContext?.event?.context?.gameData
-  if (gameData) {
-    setGameData(gameData)
-  }
-}
-
 setupGameHead()
 
 let rafId: number | null = null
diff --git a/layers/components/blocks/LanguageSwitcher.vue b/layers/components/blocks/LanguageSwitcher.vue
index 6cd0c53..158eec9 100644
--- a/layers/components/blocks/LanguageSwitcher.vue
+++ b/layers/components/blocks/LanguageSwitcher.vue
@@ -233,10 +233,10 @@ const switchLanguage = async () => {
       })
       localeCookie.value = selectedLocale.value.toLowerCase()
 
+      // gameData 즉시 갱신 (1순위)
+      await loadGameData(selectedLocale.value)
       // i18n locale 변경 (SPA)
       await setLocale(selectedLocale.value as any)
-      // gameData가 언어별로 달라지는 영역(Header/GNB 등) 즉시 갱신
-      await loadGameData(selectedLocale.value)
       // Nuxt SPA 라우팅으로 페이지 이동
       await navigateTo(path)
     }
diff --git a/layers/plugins/init-game-data.server.ts b/layers/plugins/init-game-data.server.ts
new file mode 100644
index 0000000..248d3f1
--- /dev/null
+++ b/layers/plugins/init-game-data.server.ts
@@ -0,0 +1,20 @@
+import type { GameDataValue } from '#layers/types/api/gameData'
+
+export default defineNuxtPlugin({
+  name: 'hydrate-game-data',
+  dependsOn: ['pinia'],
+  setup(_nuxtApp) {
+    if (!import.meta.server) return
+
+    const event = useRequestEvent()
+    const gameData = (event?.context as { gameData?: GameDataValue })?.gameData
+    const currentLangCode = (event?.context as { currentLangCode?: string })
+      ?.currentLangCode
+
+    if (!gameData) return
+
+    const gameDataStore = useGameDataStore()
+    gameDataStore.setCurrentLangCode(currentLangCode)
+    gameDataStore.setGameData(gameData)
+  },
+})