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You can set a specific language for an agent. Currently that setting would have the following effects:
  • Determines what language the agent would understand (language of speech to text).
  • Passes the language code to the TTS provider, which may have subtle effects on the pronunciation and accent. For multilingual, it auto-detects the language based on the text.
  • Influences the speech normalization process (see Normalize text for speech).
  • If a specific TTS model is not chosen, it may influence the automatic model selection for Elevenlabs.
What it does not do:
  • It will not enforce the agent to generate responses in a certain language. You have to set that in the prompt yourself. This can be as easy as adding something like always respond in Spanish into the prompt.
  • While the language setting may influence accent and pronunciation to some degree, the voice you select (voiceId) is the primary determinant of the accent.

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Supported languages

These are the languages we support for each TTS provider:
  • ElevenLabs: English, Arabic, Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, Filipino, Finnish, French, German, Greek, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian, Polish, Portuguese, Romanian, Russian, Slovak, Spanish, Swedish, Tamil, Turkish, Ukrainian, Vietnamese
  • Cartesia: English, Chinese, Dutch, French, German, Hindi, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, Swedish, Turkish
  • MiniMax: English, Afrikaans, Arabic, Bulgarian, Cantonese, Catalan, Chinese, Croatian, Czech, Danish, Dutch, Filipino, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Slovak, Slovenian, Spanish, Swedish, Tamil, Thai, Turkish, Ukrainian, Vietnamese
  • OpenAI: English, Afrikaans, Arabic, Armenian, Azerbaijani, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, Estonian, Finnish, French, Galician, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Latvian, Lithuanian, Macedonian, Malay, Marathi, Maori, Nepali, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Welsh
There is also a multilingual option, which will be able to understand and codeswitch between a variety of languages. Check the list of languages supported for that option by hovering over it in the dashboard.

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Set language programmatically

You can set the language of the agent in the Create Agent API or Update Agent API by setting the language field to the desired language code.