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).
Eastern Arabia
The Arabs of Eastern Arabia speak a dialect known as Gulf Arabic. Most Saudis do not speak Gulf Arabic because most Saudis do not live in Eastern Arabia. There are approximately 2 million Gulf Arabic speakers in Saudi Arabia, mostly in the coastal eastern region. Before the GCC was formed in 1981, the term "Khaleeji" was solely used to refer to the inhabitants of Eastern Arabia.