Set Language Manually

If you already know the dominant language of your audio file, you can use the language_code parameter to specify the language rather than using Automatic language detection.

When you specify a language, the system automatically routes your request to the best available model based on that language and the models you provide in the speech_models parameter. For example, with speech_models: ["universal-3-pro", "universal-2"], the system will use Universal-3-Pro for languages it supports and automatically fall back to Universal-2 for all other languages. You can check which model processed your request using the speech_model_used field in the response. See the Model selection page for more details.

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import assemblyai as aai
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aai.settings.api_key = "<YOUR_API_KEY>"
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# audio_file = "./local_file.mp3"
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audio_file = "https://assembly.ai/wildfires.mp3"
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config = aai.TranscriptionConfig(
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    speech_models=["universal-3-pro", "universal-2"],
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    language_code="es"
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)
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transcript = aai.Transcriber(config=config).transcribe(audio_file)
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if transcript.status == "error":
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  raise RuntimeError(f"Transcription failed: {transcript.error}")
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print(transcript.text)

See the Supported Languages & Features page for all supported languages and their codes.