Polylang bbPress

Great plugin! Thanks a lot!

I’ve made wp site with static pages and bbPress forum.

WordPress 3.5.2
Theme Twenty Eleven Version: 1.5
bbPress Version 2.3.2
Polylang Version 1.1.2
All plugins except Polylang and bbPress are deactivated
Permalinks /%postname%/
Custom menu is using

Translation for manually added static pages works fine.
bbPress automatically adds forum base at forums subpage
http://site.tld/forums/
But if I go to that page I get an error Page not found.

If I deactivate Polylang plugin, forums page will be found and will work.

Thank you very much.

PS
Google can’t help to solve that problem.

http://wordpress.org/extend/plugins/polylang/