Adding Chinese as an input language is already on the roadmap, so that one's coming. For the TTS side though, I'll have to pass on Volcengine. Each new TTS provider takes a considerable amount of work to integrate, and I don't add new providers just to support a single language. The good news is that Chinese already works really well with OmniVoice, a local TTS option built into the app — it supports voice cloning and the quality is genuinely great.