Saudi Arabia
The official language of Saudi Arabia is Arabic. The three main regional variants spoken by Saudis are Hejazi Arabic (about 6 million speakers), Najdi Arabic (about 8 million speakers), and Gulf Arabic (about 0.2 million speakers). Saudi Sign Language is the principal language of the deaf community. The large expatriate communities also speak their own languages, the most numerous of which are Tagalog (700,000), Rohingya (400,000), Urdu (380,000), Egyptian Arabic (300,000), and Indonesian (250,000).
Sudanese Arabs
While most Sudanese Arabs speak some form of Sudanese Arabic, some other Arab tribes speak different Arabic dialects like the Awadia and Fadnia tribes and the Bani Hassan, Al-Ashraf and Rashaida who speak Hejazi Arabic. In addition, Western province tribes like the Baggara and Darfurians) speak Chadian Arabic, although they have great variation in cultural and genealogy aspects. Sudanese Arabs descend primarily from migrants from the Arabian Peninsula and some of the pre-existing indigenous populations of Sudan, most predominantly the Nubian people who also share a common history with Egypt. In addition, a few Arabian tribes existed in Sudan prior to the advent of Islam. Nevertheless, most Arab tribes migrated into the Sudan in the 12th century and introduced Islam.