Comment by asyncadventure

The real insight here isn't just building another conversation partner—it's the UX optimization for low latency. Language anxiety is largely about response pressure, and even small delays break immersion. The technical challenge of syncing speech input, transcription, LLM responses, and TTS streaming while avoiding feedback loops is non-trivial. Consider adding conversation analytics: tracking where users hesitate, repeat phrases, or switch to easier constructions. That behavioral data could help personalize difficulty curves better than any competitor.