### Answer For Spanish pronunciation issues with letters like "J," here are a few approaches you can try: 1. Add Spanish pronunciation guidelines to your prompt – You can include specific instructions in your agent's prompt on how to pronounce letters when spelling names in Spanish. [(1) ]() 2. Enable speech normalization – This feature can help with pronunciation consistency. 3. Use the pronunciation modifiers – Retell has internal pronunciation settings in the agent configuration. However, note that some users have reported these don't always work consistently, particularly when the TTS model switches between phonetic memory and language-model inference mid-call. [(2) ]() 4. Verify your language setting – Make sure your agent's language is set to a Spanish variant (e.g.,

es-ES

or

es-419

) . The language setting passes the language code to the TTS provider, which may have subtle effects on pronunciation and accent. [(3) ]() If these steps don't fully resolve the issue, you may want to reach out to support for more advanced troubleshooting: - Visit [Contact Sales]() - Visit [) Would you like me to provide a general answer on TTS pronunciation handling techniques?

​ To learn more, see the sources I considered: [[1] spanish agent still unable to read numbers when it's a voicemail even when 4o is turned on](https://discord.com/channels/1186424376300679209/1380206423547318324) [[2] Discord message from @grumbledor1991 on 2026-01-03](https://discord.com/channels/1186424376300679209/1186462578310910112/1457106369437241414) [[3] Set language for your agent](https://docs.retellai.com/agent/language) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.