As bobertfishbone said, Google changed the way locales work. So I forked the repository and added Nougat & Oreo compatibility.
Here is the link to the git: https://github.com/Flo354/XposedAppLocale
I also made a PR but I don't have much hope ...
Thank you, it works perfectly on my Galaxy Tab S 10.5" =D
I try to implement a server side verification of an application with LVL library.
I use this php code : http://code.google.com/p/android-market-license-verification/
In the file sample/verify.php, I have two lines to complete :