One Agent, Many Languages: Architecting Multi-Lingual Voice AI

Tuesday, October 13, 2026 · 11:30 a.m. +08
Product Demo
Live Q&A
English
Level Up

One Agent, Many Languages: Architecting Multi-Lingual Voice AI

Your customers don't all speak the same language — so how do you build a single voice AI agent that greets a caller in one language, gracefully switches mid-call, and stays coherent throughout?

In this Level Up webinar, we'll build and unpack the architecture behind multi-lingual voice AI on Twilio ConversationRelay. We'll cover language detection strategies, choosing the right STT and TTS provider stack, handling mid-call language switching, and the prompt patterns that keep an LLM-driven agent grounded when the conversation crosses languages.

You'll leave knowing how to:

  1. Detect caller language and switch in real time using Twilio ConversationRelay 
  2. Choose the right STT and TTS provider stack for your target languages
  3. Structure prompts and context so your agent stays coherent across language switches
  4. Design fallbacks for unsupported languages and uncertain detection

Speakers

Kaustav Das Modak
Developer Evangelist, Ecosystem | Twilio
Michelle Duke
Developer Evangelist | Twilio

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FAQ

When and where will the Level Up recording be posted?

All registered attendees will receive a follow-up email with a direct link to watch on-demand.

How do I submit questions for the live Q&A?

Use the Q&A tab in the right-hand panel during the webinar! 

Webinar: One Agent, Many Languages: Architecting Multi-Lingual Voice AI by Twilio