Coqui TTS hallucinating with German voice cloning – outputs gibberish

I am currently devoloping an AI Learning app and i have with getting a clean output from the diffrent tts AIs. I tried Orpheus and Coqui. I had to use my own Voice references, cause there werent any german female premade voices. But if I use them, the ai starts hallucitnating and starts speaking Chines ish language. I wouldnt have a issue with switching tts AIs, but i just cant find any with a human voice and commercialy usable and cheap to no cost.