fabulous.
admin/languages from where dude? If it's in the x-cart admin language then all it is, is select languages *german* *english* bla bla bla, so on and so forth.
If it's FTP admin/languages.php then it contains nothing regarding to "categories" or anything else in the #left-bar, #right-bar or anywhere else in the file.
It has to be somewhere right?
<h3>Categories<h3> I mean, this line has to be in, some file, somewhere, right?
<filename>?