Just like I did ha so, you gonna need to change your facebook language to Bahasa (Indonesian) and then download a VPN that can use Indonesean server so facebook can know you are from Indonesia (because only Indoneseans can change their name to one name in facebook) so after you download your vpn connect to it and relog in to your facebook and go to settings to change your name, if you do exactly this you will be able to change it, it work for me and if you think it is a jock you can also search how to change fb name to one name on internet,