mangxema
I
Regarding the pronunciation difference, I think it's mainly that Britain is a lot closer to France, and so they know instinctively how to pronounce it. In contrast, very few people in the US speak French. As a result, sometimes people use French words to sound classy but often fail spectacularly... messed up accents, made up words, you name it. It drives me nuts. Plus, 'ou' is one of those vowel combinations that can mean just about anything, so hearing an unusual pronunciation isn't likely to throw you off.