extended-yellow•3h ago

Spanish agent: External API voice (11Labs)

It's all set up and with a system prompt that takes into consideration the proper numeric pronunciation and style to present the information in the Spanish language. Strict direction to speak out in Spanish I see the 11Labs and Azure and others 'supposed best voice interfaces' to fail and mixing up the numbers and some wordings with a strange intermittent language and sometimes english and french. $20.57 is 'veinte (correct)' with fifty seven (incorrect) cents. I tried the most powerful models such as Llama 3.1 & 3.3, came back to GPT 4.1 but nothing... I'd like to line up a troubleshooting ticket with 11Labs in parallel but I don't want to raise a ticket with 10 service providers, it all should be converging here. BTW, using Nova 3 and it works fine (spanish driven)

2 Replies

Vapi Support Bot•3h ago

Try explicitly configuring your Spanish voice settings and enabling text normalization for better number pronunciation.
For example, in your assistant's configuration, set the voice provider and ID for Spanish, and enable normalization if supported:

"voice": {
  "provider": "azure",
  "voiceId": "es-ES-ElviraNeural",
  "textNormalizationEnabled": true
}

"voice": {
  "provider": "azure",
  "voiceId": "es-ES-ElviraNeural",
  "textNormalizationEnabled": true
}

This helps ensure numbers like "$20.57" are pronounced fully in Spanish and reduces language mixing issues.
For more details, see the multilingual troubleshooting guide in the documentation you have found. Source: - Multilingual Configuration Guide

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

Duckie•2h ago

Message marked as helpful by @AlexVendet! 🎉

Spanish agent: External API voice (11Labs)

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