Get current language displayed by the user
===

In my page tab, I want to display the page in the language my user is currently using on Facebook (display the app in french if facebook is in french, english if facebook is in english, etc.)

I've tried several venues (like [GetSignedRequest][1]) without success. Is there an easier way to get that information via the Facebook PHP SDK?


  [1]: http://stackoverflow.com/questions/11653362/getsignedrequest-always-comes-back-null