Give a stream of consciousness and then the final answer. Arabic, with all its dialects, are the most widely spoken languages in the Middle East, with Literary Arabic being official in all North African and in most West Asian countries. Arabic dialects are also spoken in some adjacent areas in neighbouring Middle Eastern non-Arab countries. It is a member of the Semitic branch of the Afro-Asiatic languages. Several Modern South Arabian languages such as Mehri and Soqotri are also spoken Yemen and Oman. Another Semitic language such as Aramaic and its dialects are spoken mainly by Assyrians and Mandaeans. There is also a Oasis Berber-speaking community in Egypt where the language is also known as Siwa. It is a non-Semitic Afro-Asiatic language.

Answer this question: what is the most common language spoken in the middle east?
This is the relevant information: Arabic, with all its dialects, are the most widely spoken languages in the Middle East, with Literary Arabic being official in all North African and in most West Asian countries.
So, the final answer is Arabic , with all its dialects.