WikiTree appears to be using some sort of Scandinavian version of sort order (alphabetization): it puts letters with diacritics at the end, after Z.
In Hungarian, German, all of the Slavic languages written in Latin letters, Romanian, Spanish, and French, at the very least, this is Wrong-with-a-capital-W. All of these languages use some variant of filing diacritics either with the "base" letter or immediately after it. (See Wikipedia under Alphabetical Order.)
Is there any chance of a global change to "treat the diacritic just like the base letter"? This would not be perfectly correct for most languages, but it would be a whole lot less wrong than the current setup.
Failing that, is there wiki markup "magic" that could be applied to specific category pages to make things sort more-correctly there (now and in the future when new things are added to the category)?