diff --git a/backend/open_webui/routers/audio.py b/backend/open_webui/routers/audio.py
index 3156078326..65d17d53dd 100644
--- a/backend/open_webui/routers/audio.py
+++ b/backend/open_webui/routers/audio.py
@@ -492,7 +492,7 @@ async def speech(request: Request, user=Depends(get_verified_user)):
         region = request.app.state.config.TTS_AZURE_SPEECH_REGION or "eastus"
         base_url = request.app.state.config.TTS_AZURE_SPEECH_BASE_URL
         language = request.app.state.config.TTS_VOICE
-        locale = "-".join(request.app.state.config.TTS_VOICE.split("-")[:1])
+        locale = "-".join(request.app.state.config.TTS_VOICE.split("-")[:2])
         output_format = request.app.state.config.TTS_AZURE_SPEECH_OUTPUT_FORMAT
 
         try: