SOMETIMES..depends upon person..most of the time i dont care
I worked at a university for over 2 decades around international students & workers and could get a good clue by body language and tone of voice.
It's up to the person to understand the languages they feel are a threat.
Depends, in school that has happened to me... :-/
No, but if I'm with a friend who speaks some of the languages I do, I will immediately start conversing in one of them.<br />
If I get annoyed stares from the other people, I have a strong idea what they were doing.