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).
Omani Arabic
Omani Arabic (also known as Omani Hadari Arabic) is a variety of Arabic spoken in the Al Hajar Mountains of Oman and in a few neighboring coastal regions. It is the easternmost Arabic dialect. It was formerly spoken by colonists in Kenya and Tanzania, but most or all of them have shifted to Swahili. There are several distinct dialects of Omani Arabic, such as Dhofari Arabic and Shihhi Arabic.