Eastern Province, Saudi Arabia
The official language of Saudi Arabia is Arabic. The three main regional variants spoken by Saudis are Hejazi Arabic, Najdi Arabic, and Gulf Arabic. There are approximately 2 million Gulf Arabic speakers in Saudi Arabia, and the dialect is only spoken in the Eastern Province. The remaining Arabic speakers in the province speak one of the other two dialects, more commonly the Najdi dialect. 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 Indian languages, Filipino/Tagalog, Egyptian Arabic, Indonesian, Rohingya, and Urdu.Saudi Aramco, the state-owned oil producing company of Saudi Arabia, is based in Dhahran, which is located in the Eastern Province, and most decisions on oil policy and production that affect the global economy are made there. The kingdom's main oil and gas fields are mostly located in the Eastern Province, onshore and offshore. Notable among these are the Ghawar Field and the largest crude increment in the world. Petroleum from the fields is shipped to dozens of countries from the oil port of Ras Tanura and is also used as feedstock in numerous industrial plants in Jubail.
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.