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).
Hejazi Arabic
A conservative phonological feature that Hejazi holds is the lack of palatalization for the letters , and , unlike in other peninsular dialects where they can be palatalized and merged with other phonemes in certain positions (to [t͡ʃ], [t͡s], [ʃ], or [s] in case of ك, [d͡ʒ] or [d͡z] in case of ق and in case of ج), it is also worth mentioning that this trait of non-palatalization is becoming common across Saudi Arabia especially in urban centers, another feature is that the ل is only velarized to /ɫ/ in the word الله /aɫːaːh/ 'god' (except when it follows an /i/: بسمِ الله or لله ) and words derived from it, unlike other peninsular dialects where it might be velarized allophonically, as in pronounced in Hejazi but in other peninsular Arabic dialects.