Hide your last name on Facebook

Hello guy's how are you.
In this post i am going to  show you how to hide your last name on Facebook
If you look Facebook basically not have to permission hide your last name.
But in this method we are trying to other way.
Okay so let's started....
Step (1) Open your favorite browser and go to  Facebook for mobile https://m.facebook.com/
Step (2) Login your Facebook account go to the setting menu  and click Language setting