pipecat/changelog/4024.fixed.md

• Fixed Language enum values (e.g. Language.ES) not being converted to service-specific codes when passed via settings=Service.Settings(language=Language.ES) at init time. This caused API errors (e.g. 400 from Rime) because the raw enum was sent instead of the expected language code (e.g. "spa"). Runtime updates via UpdateSettingsFrame were unaffected. The fix centralizes conversion in the base TTSService and STTService classes so all services handle this consistently.