Thank you Sam!
I removed the cat on the 4 indices. 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',
Cdlt, ~nicolas