That's wild.

One of my friends is learning my native language for fun, and because he knows he can use me as a resource. I would never consider mocking him if he got something incorrect. If he asked for constructive criticism, I would mention it, but that's it.

Your coworker is correct that using the target language is the best way to learn a language, but a simple greeting in her native language seems more like a friendly, welcoming gesture than a malicious attempt to prevent her from learning her target language?

Not sure if I'm just drunk and missing something. But as a lesbian, OP sounds like a gay guy, which honestly makes this story sound plausible as heck.

Tbf, I've never even heard of an insect bike and didn't realize insects could ride bikes, so it's understandable that it would surprise someone.