I wonder if anybody has studied the use of diacritics on Wikipedia?
It is my experience that they are commonly used, but some editors are challenging that (http://en.wikipedia.org/w/index.php?title=Wikipedia:Naming_conventions_(use_...). I wonder if we have any data on that, or if somebody could create and run some form of query on the database (as I don't code, this is unfortunately beyond my capabilities).