Speaking English "over there"

I always feel bad that I don't speak a second language. There is something very surreal about going to a conference and giving a paper, in English, to an audience where English the second (or third) language of everyone else in the room. I kept thinking either "I'd better speak really well since it's my language" or "I don't have to worry about my language skills, they are the best in the room." OK, that second one is an ugly American point of view, and I really did make an effort to speak slowly, clearly and enunciate as well as I possibly can.