You do something wrong, people look at you weird, and your excuse is: "Well, that's how we do it in my country," even if it isn't
You're better than your teacher in your foreign language class.
It becomes a habit to introduce yourself by saying: "I am from (country) and my name is (name)."
Your dreams are bilingual.
You sometimes walk around school during breaks to act like you're doing something because you don't see anyone you recognize and don't want to stand there awkwardle.