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).
Sudan
Sudan has 597 groups that speak over 400 different languages and dialects. Sudanese Arabs are by far the largest ethnic group in Sudan. They are almost entirely Muslims; while the majority speak Sudanese Arabic, some other Arab tribes speak different Arabic dialects like Awadia and Fadnia tribes and Bani Arak tribes who speak Najdi Arabic; and Rufa'a, Beni Ḥassān, Al-Ashraf, Kinanah and Rashaida who speak Hejazi Arabic. In addition, the Western province comprises various ethnic groups, while a few Arab Bedouin of the northern Rizeigat and others who speak Sudanese Arabic share the same culture and backgrounds of the Sudanese Arabs.