French names are not by me, mine are on
tumblr.Anyway, about data files, I used
Data file tool for that. It's quite simple to use, just paste/type there the same names you put in xml, and it should work. If it is not based on english version ('cause there are everywhere things like <U><T n="locale_string">de-de</T><E n="language">ENGLISH</E></U>, so english goes for any kind of strings), but on another one.
So what you should do:
--- In data files: you'll see in locale mapping that de-de = 0x0000000000000007, so look for that number in random name tuning, and change female first names, last names, male first names. If you need to add some more, clone any of them and rename.
--- In xml (could be open even with notepad): (notice that in non english version everything is ok: <U><T n="locale_string">de-de</T><E n="language">GERMAN</E></U>)
So search for <E n="language">GERMAN</E><U n="random_name_tuning">, after this line you'll find the same names that you've changed in data and now need to change in xml.