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How to effectively use vosk-browser's multi-language features in smart home control scenarios?

2025-08-20 499
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Realizing multilingual smart home control requires focusing on the following practical approaches:

  • Dynamic model switching::
    1. Preloading of individual language models (e.g., en, de, fr, etc.)
    2. Cache downloaded models via localStorage
    3. Use Vosk.removeModel() to free the memory of unused models.
  • Voice Command Design::
    - Design of harmonized command structures for different languages (e.g. '[language prefix] + command': 'EN turn on lights')
    - Configure the phrase focus recognition parameter in model.conf
  • contextualization::
    - Limit the vocabulary available for the current scene via recognizer.setGrammar()
    - Combine with NLP libraries to handle synonym conversion (e.g. 'turn on the lights' = 'turn on the lights')

Typical case:
When the user says 'ES enciende la luz', the system automatically loads the Spanish model recognition and converts it to standard instruction JSON:
{'lang':'es','action':'light_on'. 'location':'living_room'}
This solution has been validated as viable in open source platforms such as HomeAssistant.

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