How to force language on facebook debugger?

Hello there, since some days, when we share a url on facebook, it's only the description and name in english who appears. did you notice a change? how did you manage it? Before, we got name and description of the product in french if the shared url was in french. I'm on the last version of Odoo 8 (nightly) and I use nginx. idea? EDIT #1 Each time that I scrape again a french link in the Facebook debugger, I note those lines in my log. An error 301 for the french url, and after, the english url

Each time that I scrape again a french link in the Facebook debugger, I note those lines in my log. An error 301 for the french url, and after, the english url is ok :.

Lee mas