The official language of Saudi Arabia is Arabic. The three main regional dialects spoken by Saudis are Hejazi Arabic, Najdi Arabic, and Gulf Arabic. Approximately 2 million people speak Gulf Arabic, a dialect spoken exclusively 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 some of the Indian languages, Filipino/Tagalog, Bengali and Urdu.