For me, computer science is both profession and hobby. I am a German and speak English, French and Japanese.
I contribute to the English version of Wikipedia, not the German, because I find that we should agree to a common language everyone on the Earth speaks as mother or foreign language. It seems English has chances to be this language, but if everybody agrees on a different common language, I am willing to learn it, and be it Chinese or Klingon.
Anyway, I agree with other Wikipedians that not my person and my opinions are important, but the facts I contribute.