Hi,
my wordpress work with 2 languages: English (default) and Italian.
I just configured 2 menu (one for each language) and selected them as primary menu.
When I clicked "save" in theme locations, secondary language code (it) was renamed to Italiano (as menu name).
I fixed language code manually, but all connections between pages, posts, categories, media, etc. has been lost.
I'm using polylang in a network based on Wordpress 3.5.1
Thanks,
Valerio