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.
Varieties of Arabic
Arabic-based pidgins (which have a limited vocabulary consisting mostly of Arabic words, but lack most Arabic morphological features) are in widespread use along the southern edge of the Sahara, and have been for a long time. In the eleventh century, the medieval geographer al-Bakri records a text in an Arabic-based pidgin, probably one that was spoken in the region corresponding to modern Mauritania. In some regions, particularly around the southern Sudan, the pidgins have creolized (see the list below).