I Built My Own AI Language Tutor App—And It Actually Works

So this person basically created their own AI girlfriend app that teaches languages, and honestly? It's pretty impressive. They're using Gemma-4-E4B-it as the brain (the LLM), paired with a custom OmniVoice text-to-speech API they built with FastAPI for the voice. The 3D model? Hand-made in VRoid Studio. Right now it can handle image uploads, web search, and video/voice calls just like Grok's Ani feature. The coolest part: they're shocked at how well Gemma 4 follows instructions without needing to be 'uncensored'—meaning it's actually useful without the usual jailbreak nonsense. Basically, they've built a functional AI language learning companion from scratch.