I noticed one issue in the Tools->Configuration Files->Filetype Configurationmenu, there is filetypes.conf listed under K which might be unexpected.
Yeah, good point, done.
Also, the human-readable name (of those several filetypes that contain it) should start by the same letter as the filetype name for the very same reason. So - for "Po" I used "Po (Gettext)" - for "Conf" I used "Conf/Ini" - and changed "(O)Caml" to "Caml/OCaml" (thanks to which I could remove a special hack used to handle the braces)