Hejaz
Historically, the Hejaz has always seen itself as separate from the rest of Saudi Arabia. The Hejaz is the most populated region in Saudi Arabia; 35% of all Saudis live there. Hejazi Arabic is the most widely spoken dialect in the region. Saudi Hejazis are of ethnically diverse origins.
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.