You're likely going to need to start all over. Enter the wrong password 10 times. That will wipe the device. It will likely still be in the arabic or whatever language. if you can figure out how to change it back, great. If not you may be able to use Desktop Manager to remove all the other languages. If you can't do that you'll need to wipe the device with JL_Cmder and reload the OS to get back to English. You'll then need to reactivate on your BES which will bring back most of your data (depending on BES version) except for messages.