Phone is a grey import meant for another market
the importer has bought it abroard for cheeper than he could get it in your country and he or the retailer has added Arabic before it was sold to you, probably voiding the warenty in the process
The update has restored the phone to its original configuration and deleted the installed pack
Only way to get it back is visit a nokia care point and pay to have them install it again
any other methods you may find via google etc cannot be discussed here