Egypt, Sudan, Somalia, Libya, Algeria, Morocco, Tunisia and...

Egypt, Sudan, Somalia, Libya, Algeria, Morocco, Tunisia and even Abyssinia and other parts where Arabic is now spoken, Arabic was not the main language at that time.

Thus we see that at the time of the birth of Islam the region of Arabia and the Arab land from the viewpoint of the Arabic language was located in the south of the Persian Gulf and the Sea of Oman extending in the west up to the Red Sea - beyond which Arabic was not prevalent - and in the north till the Jordan River valley beyond which Arabic was not prevalent, and in the east to the Tigris and Euphrates rivers. This, then was the extent of Arabia at the time of the birth of Islam.