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).
Arabic phonology
Modern Standard Arabic has six vowel phonemes forming three pairs of corresponding short and long vowels (). Many spoken varieties also include and . Modern Standard Arabic has two diphthongs (formed by a combination of short with the semivowels and ) in Classical Arabic with no allophones. Allophony in different dialects of Arabic can occur, and is partially conditioned by neighboring consonants within the same word. As a general rule, for example, and are: