Ideal thought: Islam never forms, the Arabs are never united, The Byzantines defeat the Arabs at Yarmouk, whatever. The Arab conquest just dosnt get off the ground somehow, and Roman rule of Syria, Palestine and Egypt continues for centuries more. Lets also say that the Arabs are also unable to topple the Sassanians, ether. So, what are the linguistic consequences? Could Arabic replace the Aramaic and Coptic languages in these regions peacefully? Or would they likely still predominate? Is it possible that creeping Hellenization in the Byzantine Empire could eventually result in the extinction of Semitic languages in Syria and Palestine and Coptic in Egypt?