Wikipedia as a single project that happens to have content in an admixture of languages (much as the World Wide Web is a single network that happens to have sites in an admixture of languages--the world does much better with a single geo-neutral Web instead of an American Web, Chinese Web, Polish Web. I am also troubled by the forces which are trying to balkanize the Web).
I thank you for discussing this in my native tongue. My Polish is worse than minimal.