VAPI•3mo ago

Agent hangs and starts to speak with random words from different languages

I use Agent in Norwegian...and after some exchange in messages it starts to bullshit ...so it begins in nortwegian and then continues with occasional words from several languages. Transcriber often struggles as well

Vapi Support BotAPP•9/25/25, 9:17 PM

Thank you for describing the issue. To help pinpoint the cause, could you please confirm which speech-to-text (transcriber) provider and model you are currently using for your Norwegian agent? This will help determine if the problem is related to language detection or transcription accuracy.

Sources:

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

specific-silverOP•9/25/25, 9:25 PM

One that works best with norwegian is Deepgram, but even it bullshitts a lot and often transcribes wrong

specific-silverOP•9/26/25, 8:00 AM

Fathom app manage to transcribe norwegian well, but Vapi gives me garbage with all transcribers

specific-silverOP•9/26/25, 8:55 AM

her er Call ID: f598a974-c6b1-42ff-b239-8400242031a3 It talks OK to the end and at last message starts to spit out some wiered stuff - mix of some words in non definite language - some are norwegians others I dont know what it is

VapiAPP•9/29/25, 6:34 PM

Hi ivrig,

For setting up a multilingual support agent, here's a concise guide based on the documentation you've provided:

Create a Multilingual Knowledge Base: Upload customers.csvcustomers.csv, products.csvproducts.csv, and support_articles.csvsupport_articles.csv to your Vapi dashboard's Files section. Note their file IDs for tool creation.
**Create a Multilingual Assistant**:
- Go to the Assistants section in your Vapi Dashboard.
- Create a new assistant using a blank template and name it GlobalTech Support AgentGlobalTech Support Agent.
**Configure Multilingual Transcription**:
- In the assistant's Transcriber section, select DeepgramDeepgram as the provider and choose Nova 2Nova 2 or Nova 3Nova 3 as the model. Set the language to MultiMulti for automatic detection.
**Configure Multilingual Voice Synthesis**:
- In the Voice section, use AzureAzure as the provider. Set the primary voice to en-US-AriaNeuralen-US-AriaNeural for English and add fallback voices for other languages: es-ES-ElviraNeurales-ES-ElviraNeural for Spanish and fr-FR-DeniseNeuralfr-FR-DeniseNeural for French.
**Configure System Prompt**:
- Draft a multilingual system prompt that details language capabilities and core functions. Include specific tone, style, and formality guidelines for each language.
**Add Multilingual Tools**:
- Create tools for customer lookup, product information, and support articles using the uploaded CSV files as knowledge bases. Link these tools to your assistant.
**Set Up Phone Number**:
- Navigate to Phone Numbers in your dashboard and create a new number. Assign the number to your assistant under Inbound Settings.

This setup will help your multilingual agent detect and respond in English, Spanish, and French, allowing seamless language transitions. You can find more detailed steps and options in the Vapi multilingual agent example.

If this doesn’t resolve the issue, please let us know and we’ll be happy to step in and assist further.

Agent hangs and starts to speak with random words from different languages

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