The STT and LLM support many languages out of the box. For TTS we use multiple providers based on their strengths and weaknesses (for example minimax is great for Chinese)
replyWe've done a lot of testing on Spanish, English, Italian, Japanese, and French, but much less on the others and none at all for some of the niche ones.
The language support is based on the intersection of the languages that have low word errors rates in the transcribers, as well as officially supported by LLM/TTS (like gpt4.1, eleven labs etc).
We've seen the models' quality improve consistently over the last 6 months, in all languages we tested, and now the error rates are getting really low.
Right - I think it would be appreciated by your users if you at the very least made it clear from the outset how well different languages are supported and what degree of testing you have done.
replyCertainly if your product were to mis-teach me important details, and I were to then find out that you had spent less time testing than I had spent learning, I would be quite angry.