Peninsular Arabic
Peninsular Arabic, or Southern Arabic, are the varieties of Arabic spoken throughout the Arabian Peninsula. This includes the countries of Saudi Arabia, Yemen, Oman, United Arab Emirates, Kuwait, Bahrain, Qatar, Southern Iraq and the tribal people of Jordan (the native Jordanians).
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.