Hi Chouby,
I'm currently using a theme that might have some compatibility issues with Polylang.
http://themeforest.net/item/permatex-leads-generating-wordpress-landing-page/5436960
The landing page/front page is a combination of pages and it's not possible to translate it like all the rest of the website.
When changing the language, I loose the front page look...
I know that this might be beyond your scope but maybe you have THE quick answer that could help us a lot :-)
Website: http://www.teeptrak.com
user/password on demand.
Merci d'avance :-)
++
Francois