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Not sure which language is spoken ? See Automatic language detection. For conversations mixing languages, see Code switching.
In our APIs and results, languages use 2-letter ISO 639-1 codes. When no 639-1 code exists, we use the corresponding ISO 639-3 three-letter code (e.g. haw for Hawaiian).
Use the 2-letter code in language_config.languages (e.g. [“en”, “fr”]).