Yeah, the opening paragraph to this one lost me. I have a Canadian passport and I was living in Canada at the time and we spell it "colour" there. But yes, I chose to go with American English over Canadian/Danish/Inuktituk simply because I was already used to that from other languages. Like others have mentioned, non-American programmers don't tend to think of the terms in programming languages as an extension of the language, but simply as tokens that do things. Having those tokens consistent across languages makes sense.