Professor Lupin Madblood said:
Yeah, really prissy Québeckers (I have no idea how to spell that) can get upset about pretty much anything. If I had to guess, your parents were speaking English, right? That's about all it takes for some people.
Yeah, they were speaking English, because the waitress was speaking English to us. Though I can't speak very much French, my parents both can. If the waitress had spoken in French, my parents probably would have spoken in French back to her.
And it's not like we were even in Quebec at the time. We were visiting a family friend in Calgary, Alberta.