I see no reason why such a survey should be restricted to any one language wikipedia, other than the practical issue of translation. And I don't think it would be too hard to get collaborative translation projects going of the master survey version, on a wikipedia-by-wikipedia basis. By the way, off topic grammatical note on "Wikipedia" (capitalized) vs. "wikipedia" (small letters): I understand that the standard English rule for capitalizing things like this (I don't know how this works in other languages) is that when you are referring to something of which there are many instances, you should use small letters. However, if there is only one such sample in the whole world/universe, you should capitalize it. For instance, website uses small letters because there are millions of them, but the Web is capitalized because there's only one World Wide Web. The Sun should be capitalized (though it often is not, in practice) when referring to [[Sol]], the star of the Solar System, but sun should be left in small letters when referring to any generic star in any generic solar system. By this rule, I would think that "wikipedia" (small letters) should refer to any of various language wikipedias (e.g. de.wikipedia.org and zh.wikipedia.org), whereas "Wikipedia" (capitalized) should refer to the big mama that comprises all the daughter wikipedias (the Wikipedia should be www.wikipedia.org, though that link automatically points to the wikipedia at en.wikipedia.org, I guess because that one was the first, and is the largest and the most visited).