diff --git a/modules/connectors/connectorVoiceGoogle.py b/modules/connectors/connectorVoiceGoogle.py
index 85a19bf7..42efffcf 100644
--- a/modules/connectors/connectorVoiceGoogle.py
+++ b/modules/connectors/connectorVoiceGoogle.py
@@ -778,9 +778,17 @@ class ConnectorGoogleSpeech:
     def _getDefaultVoice(self, languageCode: str) -> str:
         """
         Get default voice name for a language code.
-        Returns None - no defaults, let the frontend handle voice selection.
+        Falls back to a Wavenet voice for common languages.
         """
-        return None
+        _defaults = {
+            "de-DE": "de-DE-Wavenet-A",
+            "de-CH": "de-DE-Wavenet-A",
+            "en-US": "en-US-Wavenet-C",
+            "en-GB": "en-GB-Wavenet-A",
+            "fr-FR": "fr-FR-Wavenet-A",
+            "it-IT": "it-IT-Wavenet-A",
+        }
+        return _defaults.get(languageCode)
     
     async def getAvailableLanguages(self) -> Dict[str, Any]:
         """
diff --git a/modules/features/teamsbot/routeFeatureTeamsbot.py b/modules/features/teamsbot/routeFeatureTeamsbot.py
index 91cd4cec..2abd2cf7 100644
--- a/modules/features/teamsbot/routeFeatureTeamsbot.py
+++ b/modules/features/teamsbot/routeFeatureTeamsbot.py
@@ -391,7 +391,7 @@ async def updateConfig(
     # Save to FeatureInstance.config
     rootInterface = getRootInterface()
     featureInterface = getFeatureInterface(rootInterface.db)
-    featureInterface.updateFeatureInstanceConfig(instanceId, mergedConfig.model_dump())
+    featureInterface.updateFeatureInstance(instanceId, {"config": mergedConfig.model_dump()})
     
     logger.info(f"Teamsbot config updated for instance {instanceId}: {list(updateDict.keys())}")
     return {"config": mergedConfig.model_dump()}
@@ -408,20 +408,45 @@ async def testVoice(
     instanceId: str,
     context: RequestContext = Depends(getRequestContext),
 ):
-    """Test TTS voice with a sample text. Returns base64-encoded audio."""
+    """Test TTS voice with AI-generated sample text in the correct language."""
     from modules.interfaces.interfaceVoiceObjects import getVoiceInterface
+    from modules.services.serviceAi.mainServiceAi import AiService
+    from modules.datamodels.datamodelAi import AiCallRequest, AiCallOptions, OperationTypeEnum, PriorityEnum
 
     mandateId = _validateInstanceAccess(instanceId, context)
 
     body = await request.json()
-    text = body.get("text", "Hallo, ich bin der AI-Assistent. Wie kann ich helfen?")
     language = body.get("language", "de-DE")
     voiceId = body.get("voiceId")
+    botName = body.get("botName", "AI Assistant")
 
     try:
+        # Generate test text dynamically via AI in the correct language
+        serviceContext = type('Ctx', (), {
+            'user': context.user, 'mandateId': mandateId,
+            'featureInstanceId': instanceId, 'featureCode': 'teamsbot'
+        })()
+        aiService = AiService(serviceCenter=serviceContext)
+        await aiService.ensureAiObjectsInitialized()
+
+        aiRequest = AiCallRequest(
+            prompt=f"Generate a short, friendly introduction sentence (max 2 sentences) for a meeting bot named '{botName}'. "
+                   f"Write ONLY in the language '{language}'. No quotes, no explanation, just the text to speak.",
+            context="",
+            options=AiCallOptions(
+                operationType=OperationTypeEnum.DATA_ANALYSE,
+                priority=PriorityEnum.SPEED,
+            )
+        )
+        aiResponse = await aiService.callAi(aiRequest)
+        testText = aiResponse.content.strip().strip('"').strip("'") if aiResponse and aiResponse.errorCount == 0 else f"Hello, I am {botName}."
+
+        logger.info(f"Voice test: generated text in {language}: '{testText[:60]}...'")
+
+        # Convert to speech
         voiceInterface = getVoiceInterface(context.user, mandateId)
         result = await voiceInterface.textToSpeech(
-            text=text,
+            text=testText,
             languageCode=language,
             voiceName=voiceId,
         )
@@ -439,6 +464,7 @@ async def testVoice(
                     "format": "mp3",
                     "language": language,
                     "voiceId": voiceId,
+                    "text": testText,
                 }
 
         return {"success": False, "error": "TTS returned no audio"}
diff --git a/modules/interfaces/interfaceFeatures.py b/modules/interfaces/interfaceFeatures.py
index 4866a0d6..b261e76e 100644
--- a/modules/interfaces/interfaceFeatures.py
+++ b/modules/interfaces/interfaceFeatures.py
@@ -406,7 +406,7 @@ class FeatureInterface:
                 return None
             
             # Only allow updating specific fields
-            allowedFields = {"label", "enabled"}
+            allowedFields = {"label", "enabled", "config"}
             filteredData = {k: v for k, v in updateData.items() if k in allowedFields}
             
             if not filteredData:
diff --git a/modules/interfaces/interfaceVoiceObjects.py b/modules/interfaces/interfaceVoiceObjects.py
index cccebce4..6efe51cf 100644
--- a/modules/interfaces/interfaceVoiceObjects.py
+++ b/modules/interfaces/interfaceVoiceObjects.py
@@ -271,10 +271,17 @@ class VoiceObjects:
             
             if result["success"]:
                 logger.info(f"✅ Text-to-Speech successful: {len(result['audio_content'])} bytes")
+                # Map connector snake_case keys to camelCase for consistent API
+                return {
+                    "success": True,
+                    "audioContent": result["audio_content"],
+                    "audioFormat": result.get("audio_format", "mp3"),
+                    "languageCode": result.get("language_code", languageCode),
+                    "voiceName": result.get("voice_name", voiceName),
+                }
             else:
                 logger.warning(f"⚠️ Text-to-Speech failed: {result.get('error', 'Unknown error')}")
-            
-            return result
+                return result
             
         except Exception as e:
             logger.error(f"❌ Text-to-Speech error: {e}")