Show HN: Virtual mentor for learning German (Bottom-right)

Hi HN! I have been improving my webapp to learn languages. I started with short stories so that users can quickly read bits of German and translate the parts they need by tapping on words. Today, I'm adding a virtual mentor which lets you ask questions about the German language, culture or the related countries. In any story, you can click chat button at the bottom-right corner to access the mentor. Thanks for reading! Let me know what you think!

A story: https://webbu.app/l/german/story/der-verlorene-badeanzug-eas...

The mentor directly (UPDATED: I removed the login check for this URL): https://webbu.app/l/german/mentor