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).
Varieties of Arabic
Arabic-based pidgins (which have a limited vocabulary consisting mostly of Arabic words, but lack most Arabic morphological features) are in widespread use along the southern edge of the Sahara, and have been for a long time. In the eleventh century, the medieval geographer al-Bakri records a text in an Arabic-based pidgin, probably one that was spoken in the region corresponding to modern Mauritania. In some regions, particularly around the southern Sudan, the pidgins have creolized (see the list below).