I had the same issue. I got rid of it by removing all languages except English (United States).
Hook your phone up to your computer, Open up your desktop software, click on applications tab on left side, go the section labeled "language and input support" and remove all language other than English US.
This worked for me to get the "EN" to go away. If you need other languages, maybe removing them and then reinstall them might work, but if you don't need any language other than English US this should work.