Gladia can automatically detect the spoken language from audio, either within a candidate set you provide or across all supported languages.
Provide a small list of likely languages when possible. It improves accuracy and reduces latency.

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How to use language detection ?

You can either omit language_config.languages to search across all supported languages, or pass a constrained list: 
{
  "encoding": "wav/pcm",
  "sample_rate": 16000,
  "bit_depth": 16,
  "channels": 1,
  "language_config": {
    "languages": [],
    "code_switching": false
  }
}
The detected language is returned on each utterance and can vary over time if you also enable code switching.

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Tips

  • Use supported languages to pick valid ISO 639-1 codes.
  • Combine with messages_config.receive_partial_transcripts in real time to get immediate feedback.
  • For mixed-language conversations, enable code switching.