Hejaz
Historically, the Hejaz has always seen itself as separate from the rest of Saudi Arabia. The Hejaz is the most populated region in Saudi Arabia; 35% of all Saudis live there. Hejazi Arabic is the most widely spoken dialect in the region. Saudi Hejazis are of ethnically diverse origins.
Sudanese Arabs
It was noted in the late 19th century that the Arabic spoken in Sudan still largely maintained grammatical and dialectical features similar to that introduced from the Arabian Peninsula in the 12th century, and as a result Sudanese Arabic is a form of pure or "archaic Arabic." This, among other features, serves to distinguish the Arabic spoken in Sudan from that of its neighbor, Egypt.