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.
Sylheti language
1. Jalalabadi Sylheti: This dialect is mostly spoken in the Sylhet, Moulvibazar and Habiganj districts. It is heavily influenced by Arabic and Persian due to arrival of Islam in the region. Named after Shah Jalal, it is mostly spoken by the Muslim population although Hindus in these areas may also speak in this dialect. Covering most of the Sylhet region, there are slight differences in vocabulary which can still be seen although it is one dialect. This dialect is also viewed as the standard version of Sylheti.