When I was in first grade I was learning both English and Ukrainian side by side. I started writing my name in Ukrainian on my school papers. The teacher gently asked me to please write it in English so when students passed out the papers they could read it. I agreed, and it didn't upset me, but the event has stuck in my mind all these years. So it did make an impact.
I wonder if there was some further depth to this story. Maybe the student had been one who acted out and she was giggling with her friend while doing it, and that upset the teacher?
As a related note, on my recent family cruise when my father was drinking a lot, he would go off with strangers, drink with them, then point at family members and say something to the strangers and they would all laugh uproariously. Maybe what he was saying was not hurtful. But it *felt* hurtful. So it might have been something like that.
When I am in a store and employees are gathered and talking in a foreign language, and looking at me and laughing, it bothers me. Maybe they're not talking about me. But it feels very uncomfortable. I wouldn't feel that way if they were talking in English (unless of course they were in fact being nasty about me

)
So I see both sides here.
Good post, PDM.