Trying to internationalize some open graph's achievements. I tried to put alternate og:locale as described in http://developers.facebook.com/docs/beta/opengraph/internationalization/. 
When doing so, my open graph "achievements" objects are actually crawled with an alternate fb_locale, but only for the en_US locale, ignoring others.  
Is this the proper way to perform internationalizations for achievements?
                        
Have you tried to use
localeurl variable like that: