diff --git a/frontend/src/components/korea/OpsGuideModal.tsx b/frontend/src/components/korea/OpsGuideModal.tsx
index 9625230..9e06004 100644
--- a/frontend/src/components/korea/OpsGuideModal.tsx
+++ b/frontend/src/components/korea/OpsGuideModal.tsx
@@ -150,7 +150,7 @@ export function OpsGuideModal({ ships, onClose, onFlyTo, onRouteSelect }: Props)
     if (audioRef.current) { audioRef.current.pause(); audioRef.current = null; }
     setSpeakingIdx(idx);
     const encoded = encodeURIComponent(text);
-    const url = `https://translate.google.com/translate_tts?ie=UTF-8&client=tw-ob&tl=zh-CN&q=${encoded}`;
+    const url = `/api/gtts?ie=UTF-8&client=tw-ob&tl=zh-CN&q=${encoded}`;
     const audio = new Audio(url);
     audioRef.current = audio;
     audio.onended = () => setSpeakingIdx(null);
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index d81f6ba..1826b7d 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -115,6 +115,16 @@ export default defineConfig(({ mode }): UserConfig => ({
         changeOrigin: true,
         rewrite: (path) => path.replace(/^\/ollama/, ''),
       },
+      '/api/gtts': {
+        target: 'https://translate.google.com',
+        changeOrigin: true,
+        rewrite: (path) => path.replace(/^\/api\/gtts/, '/translate_tts'),
+        secure: true,
+        headers: {
+          'Referer': 'https://translate.google.com/',
+          'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36',
+        },
+      },
     },
   },
 }))