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Overview

The input_language field in your session configuration allows users to speak in different languages. The AI agent will understand their speech and respond in English.
The model will still respond in English, even if the user speaks in a different language.

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Supported Languages

Currently supported input languages:
  • en - English (default)
  • zh - Chinese (Mandarin)
  • hi - Hindi

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Configuration

Add input_language to your session configuration: 
const sessionConfig = {
  model: "outspeed-v1",
  instructions: "You are a helpful assistant.",
  voice: "sophie",
  input_language: "zh", // User can speak in Chinese
  turn_detection: {
    type: "semantic_vad",
  },
  first_message: "Hello! How can I help you today?",
};

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Language Examples

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English (Default)

const sessionConfig = {
  // rest of config...
  input_language: "en", // or omit this field entirely
};

// User speaks: "What's the weather like?"
// Agent responds: "The weather is sunny and 72°F."

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Chinese (Mandarin)

const sessionConfig = {
  // rest of config...
  input_language: "zh",
};

// User speaks: "今天天气怎么样？" (How's the weather today?)
// Agent responds: "The weather is sunny and 72°F."

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Hindi

const sessionConfig = {
  // rest of config...
  input_language: "hi",
};

// User speaks: "आज मौसम कैसा है?" (How's the weather today?)
// Agent responds: "The weather is sunny and 72°F."

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Important Notes

  • Input only: This setting only affects the language users can speak in
  • English output: The AI agent will always respond in English
  • Default behavior: Default input language value is en for English
  • Single language: Each session supports one input language at a time