Personally I wouldn't mind it if people asked questions in other languages - though if they did I would appreciate it if someone offered a translation. (And hopefully a translation back of the best answers.)

However I have to admit that I would probably weary fairly rapidly if some enterprising monk were to take to translating the best questions and answers into another language and posting those.

As for cultural imperialism, I can offer no good solutions. The amount that English imperialism in programming is taken for granted first became clear to me when TheDamian pointed out that when he wrote Lingua::Romana::Perligata he had no body of theory on how to parse inflected languages to draw on. Positional languages? No problem, English is positional. But try to identify the role of a word in a sentence by doing it like languages from Latin to Russian to Sanskrit? You are on your own.

And a final random note. I challenge anyone here, native speaker or not, to honestly say that they can read this poem aloud correctly on the first try...