feat(asyncai): add multilingual TTS support

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added multilingual support for AsyncAI in `AsyncAITTSService` and `AsyncAIHttpTTSService`.
+  - New `languages`:  `es`, `fr`, `de`, `it`.
+
 - Added new frames `InputTransportMessageUrgentFrame` and
   `DailyInputTransportMessageUrgentFrame` for transport messages received from
   external sources.

src/pipecat/services/asyncai/tts.py

@@ -52,6 +52,10 @@ def language_to_async_language(language: Language) -> Optional[str]:
     """
     BASE_LANGUAGES = {
         Language.EN: "en",
+        Language.FR: "fr",
+        Language.ES: "es",
+        Language.DE: "de",
+        Language.IT: "it",
     }
 
     result = BASE_LANGUAGES.get(language)