The second thing you want to know about my language is how to insult someone? Baffling, but happened more than once.

I don’t think it’s that baffling - you mentioned being a younger immigrant, right, so presumably these are questions that teenagers or young adults have asked you? They’re very into “immature” stuff like that

However, I think people ask for swear words also because

1. It sticks in their head more, so the person can say “i know some words in Spanish!” without forgetting it. (Spanish is just an example)
2. They tend to be one of the most unique parts of a language, and also don’t require learning grammar rules
3. It means they have something they can use to swear with without other people noticing they are swearing. So conflict is avoided.