Thanks! All merged, and the tool site updated.
I've also tried adding French (with the 'help' of google translate) but as there's only 4 works showing I'm not sure the following is correct:
'cat_label' => 'Catégorie',
'cat_root' => 'Principale',
'index_ns' => 112,
'index_root' => 'Textes_validés',
(Basically, for each language it needs to know the root cat and the validated indices cat.)
—sam.