Optional language on Instant Voice Cloning
language_code / target_language_code is now optional on POST /voices/clone, POST /voices/clone/stream, and GET /voices/clone/ws. Omit it to detect the language from text. Pass the code when pronunciation has to be exact — detection can be wrong on short or code-mixed text, romanized Indic and Urdu return 400, and short Assamese without ৰ or ৱ is often detected as Bengali. On the WebSocket the first detection stays locked until you send a new config with an explicit code. See Supported languages.