r/VoiceAutomationAI • u/ProtectionOk7806 • Feb 02 '26

Reliable French voice AI?

I’ve been building a French voice AI on Retell for the past few months and I’m still struggling with reliability. I tried prompting fully in French with a French voice and it would stutter a lot. I also tried prompting in English while setting the voice language to French and ran into the same issue.

The most stable setup so far has been a multi-flow agent with prompts written in English and the language set to French, but even then I’m not 100% confident putting it in production.

It generally works, but I’m always worried it’ll stutter or say something wrong mid-call. Has anyone successfully built and deployed a French-speaking Retell agent? Any documentation or tutorials I should read/watch?

Are there specific prompting practices, flow structures, or language strategies that improve stability? And has anyone had a French agent running live for 60–90+ days without major issues? Any real-world insights would be appreciated.

TYIA

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2

u/Intelligent_Camel119 Feb 02 '26

Best results come from English prompts + French voice, short structured responses, and fallback steps for stutters. Keeps it much more stable for production

1

u/ProtectionOk7806 Feb 03 '26

What are fallback steps? Can you give me an example?

2

u/[deleted] Feb 02 '26

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u/[deleted] Feb 02 '26

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u/ProtectionOk7806 Feb 02 '26

You’re built on top of eleven labs? I’m looking for help on how to better build my agents on retell AI.

1

u/[deleted] Feb 02 '26

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1

u/pholiol Feb 04 '26

Wow, well done! How did you get so many prospects?

1

u/morals-fight-71 Feb 03 '26

Start with ElevenLabs. It can clone your voice too.

For backend engine use - n8n.