Language

Learn how to configure your agent to speak multiple languages.

Overview

This guide shows you how to configure your agent to speak multiple languages. You’ll learn to:

  • Configure your agent’s primary language
  • Add support for multiple languages
  • Set language-specific voices and first messages
  • Optimize voice selection for natural pronunciation

Guide

1

Default agent language

When you create a new agent, it’s configured with:

  • English as the primary language
  • Flash v2 model for fast, English-only responses
  • A default first message.
Conversational AI language overview

Additional languages switch the agent to use the v2.5 Multilingual model. English will always use the v2 model.

2

Add additional languages

First, navigate to your agent’s configuration page and locate the Agent tab.

  1. In the Additional Languages add an additional language (e.g. French)
  2. Review the first message, which is automatically translated using a Large Language Model (LLM). Customize it as needed for each additional language to ensure accuracy and cultural relevance.
Conversational AI language selection

Selecting the All option in the Additional Languages dropdown will configure the agent to support 31 languages. Collectively, these languages are spoken by approximately 90% of the world’s population.

3

Configure language-specific voices

For optimal pronounciation, configure each additional language with a language-specific voice from our Voice Library.

Conversational AI language-specific voice setting
4

Starting a call

Now that the agent is configured to support additional languages, the widget will prompt the user for their preferred language before the conversation begins.

If using the SDK, the language can be set programmatically using conversation overrides. See the Dynamic Conversation guide for implementation details.

Language selection before call

Language selection is fixed for the duration of the call - users cannot switch languages mid-conversation.

Best practices

Select voices specifically trained in your target languages. This ensures:

  • Natural pronunciation
  • Appropriate regional accents
  • Better handling of language-specific nuances

While automatic translations are provided, consider:

  • Reviewing translations for accuracy
  • Adapting greetings for cultural context
  • Adjusting formal/informal tone as needed
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