You sound like you have an ex-Japan BMW.

Most of these cars have the ability to change the language from Japanese to English. You need to go through the menu - I've done a few but I forget the steps. Somewhere you find a menu that has the word "English" in it, or "GB" or "UK". That's the language setting.

The navigation computer is a special version for Japan, it can never work in Bahrain. If you want the nav to work in Bahrain, you have to change the nav computer from the Jap model to the Mk4 Euro navigation computer.