https://app.play.ht/voices/voice-library?category=conversational&language=thai non of the That voices work to add into Vapi by their Voice ID manually, and they are NOT in the dropdown list to pick. Since Elevenlabs doesn't support Thai on their current models. Play AI is the alternative to use, but it errors out when trying to add manually. I have written about this in the Discord chat for about 2 months now and it's still not solved.

Add your PlayHT API keys, sync voices from the dashboard, and select the voice, manual Voice ID entry isn’t supported..

Hi Lion, I am looking to use Thai language too. Did this one work?

This is not possible. I have done this: 1. Deleted API keys and re-added them in Vapi for Play.ht. Confirmed valid. 2. Clicked on Voice Library, choosed playht and clicked Sync 3. The voices is not showing up for any Thai language in my Assistant. To sync voices is for private voices. I wish to the official voice provided from PlayHT, not to create my own Thai voice. @Kings_big💫

I was informed can use Azure voice for thai and tried in dashboard it works - I use Achara