Switching languages on the run

comprehensive-tomato · 2025-05-29T16:11:50.074Z

Im wondering if any of you guys worked on a "multilingual" agent, basically if the customer speaks in english, it answers in english if the customer speaks in german, it answers in german any way of doing this ?

V

Vapi Support BotAPP•5/29/25, 4:13 PM

Yes, you can build a multilingual agent in Vapi!
Set your assistant's transcriber to a provider like Google or Deepgram that supports multilingual transcription. Vapi will detect the spoken language and, if you use the

contents

contents

contents

contents property for messages, will automatically translate responses to match the user's language.
Example configuration for a multilingual transcriber:

"transcriber": {
  "provider": "google",
  "model": "default",
  "language": "multilingual"
}

"transcriber": {
  "provider": "google",
  "model": "default",
  "language": "multilingual"
}

"transcriber": {
  "provider": "google",
  "model": "default",
  "language": "multilingual"
}

"transcriber": {
  "provider": "google",
  "model": "default",
  "language": "multilingual"
}

See the multilingual support docs for more details.

Sources:

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

E

extreme-purple•5/29/25, 5:51 PM

By detecting the user’s language, dynamically adjusting prompts, and using multilingual transcription and voice synthesis services, you can build a Vapi assistant that responds in the user’s language.

V

Vapi Support BotAPP•5/29/25, 5:52 PM

Absolutely, you can build a multilingual agent in Vapi! By configuring your assistant to use a transcriber provider like Google or Deepgram that supports multilingual transcription, Vapi can detect the language your customer is speaking. If you use the

contents

contents

contents

contents property for messages, the assistant will automatically translate its responses to match the user's language. This means your agent can seamlessly switch between languages like English and German during a conversation, responding in whichever language the customer uses.

V

Vapi Support BotAPP•5/29/25, 5:52 PM

Absolutely, you can build a multilingual agent in Vapi! By configuring your assistant to use a transcriber provider like Google or Deepgram that supports multilingual transcription, Vapi can detect the language your customer is speaking. If you use the

contents

contents

contents

contents property for messages, the assistant will automatically translate its responses to match the user's language. This means your agent can seamlessly switch between languages like English and German during a conversation, responding in whichever language the customer uses.

V

Vapi Support BotAPP•5/29/25, 5:52 PM

Absolutely, you can build a multilingual agent in Vapi! By configuring your assistant to use a transcriber provider like Google or Deepgram that supports multilingual transcription, Vapi can detect the language your customer is speaking. If you use the

contents

contents

contents

contents property for messages, the assistant will automatically translate its responses to match the user's language. This means your agent can seamlessly switch between languages like English and German during a conversation, responding in whichever language the customer uses.

C

comprehensive-tomatoOP•6/4/25, 7:07 PM

@Kings_big

uhm can you elaborate please?

E

extreme-purple•6/5/25, 9:16 AM

I meant you can make a multilingual Vapi assistant by enabling auto language detection in the transcriber, dynamically adjusting prompts based on the detected language, and selecting matching voice synthesis for natural responses.

https://docs.vapi.ai/customization/multilingual

Multilingual | Vapi

Set up multilingual support for your assistant

C

comprehensive-tomatoOP•6/6/25, 11:52 AM

i see that link updates stuff before startging the call
{
"voice": {
"provider": "azure",
"voiceId": "es-ES-ElviraNeural"
}
}

my idea is to switch the language once the call has already started, sorry for the insitence but i do not yet understand how to do so !
thank you so much for your time and help

C

comprehensive-tomatoOP•6/6/25, 12:00 PM

with multilingual i mean dynamic language switching during calls

V

VapiAPP•6/7/25, 10:01 AM

Use these settings for multilingual assistant:

Model: Any
Transcriber: Deepgram - Multi
Voice: 11labs - eleven_turbo_v2_5

Model: Any
Transcriber: Deepgram - Multi
Voice: 11labs - eleven_turbo_v2_5

Model: Any
Transcriber: Deepgram - Multi
Voice: 11labs - eleven_turbo_v2_5

Model: Any
Transcriber: Deepgram - Multi
Voice: 11labs - eleven_turbo_v2_5

C

comprehensive-tomatoOP•6/8/25, 2:03 PM

thank. you kyle !

Lltd-scarlet Absolutely, you can build a multilingual agent in Vapi! By configuring your assi...

D

dramatic-maroon•7/5/25, 7:28 PM

yes only the workflow use of google is not posible because it is done for the last 6 days...

Switching languages on the run

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