I resolved the loop about hidden cat.

There seem to be some (cache?) problem; when I try to test you tool for br.ws, « Categories loading, please wait... » doesn't disappear and the result never shows up.

For fr.ws, it's allways the old 4 books in the result from Textes validés instead of the books from Livres terminés.

I've looked into la.ws but I didn't found the equivalent of 'validated works'...

For es.ws, it seems to be :
        'cat_label'  => 'Categoría',
        'cat_root'   => 'Principal',
        'index_ns'   => 104,
        'index_root' => 'Índices validados',