I have been finding the same frustration this morning. I am interested in searching for books in Italian, French and Spanish but find the same problem as you. It would be much easier if there was sub-categories under language that allowed you to filter further. Furthermore if this could be done there is a good chance that the mainland Europe ex-pat community would dive in here as it is hideously expensive to import foreign language books. Please split Language into:
-Non-Fiction>Reference (for dictionaries and learning and phrase book guides)
-Fiction>Italian/Spanish/German/French/Portugese etc etc
It is tiresome trawling through 274 'Language' books dumped into one category.