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
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.