Code switching handles conversations where speakers switch languages mid-utterance or across turns. Gladia can detect and transcribe the active language dynamically, and annotate results with the detected languages code.
For best accuracy and latency, provide a small set of expected languages. Avoid listing dozens of similar languages.

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How to use code switching ?

Enable code switching in the session configuration: 
{
  "encoding": "wav/pcm",
  "sample_rate": 16000,
  "bit_depth": 16,
  "channels": 1,
  "language_config": {
    "languages": ["en", "de", "fr"],
    "code_switching": true
  }
}
When enabled, transcript messages include the detected language per utterance and per word. Use the transcript message schema for details.
You can also omit languages to allow detection across all supported languages, but constraining the set usually improves accuracy.

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Recommendations

  • Limit the number of languages to those you expect.
  • Combine with custom vocabulary per language for domain terms.