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).
Semitic languages
For more comparative vocabulary lists, see Wiktionary appendices:There are six fairly uncontroversial nodes within the Semitic languages: East Semitic, Northwest Semitic, North Arabian, Old South Arabian (also known as Sayhadic), Modern South Arabian, and Ethiopian Semitic. These are generally grouped further, but there is ongoing debate as to which belong together. The classification based on shared innovations given below, established by Robert Hetzron in 1976 and with later emendations by John Huehnergard and Rodgers as summarized in Hetzron 1997, is the most widely accepted today. In particular, several Semiticists still argue for the traditional (partially nonlinguistic) view of Arabic as part of South Semitic, and a few (e.g. Alexander Militarev or the German-Egyptian professor Arafa Hussein Mustafa) see the South Arabian languages as a third branch of Semitic alongside East and West Semitic, rather than as a subgroup of South Semitic. Roger Blench notes that the Gurage languages are highly divergent and wonders whether they might not be a primary branch, reflecting an origin of Afroasiatic in or near Ethiopia. At a lower level, there is still no general agreement on where to draw the line between "languages" and "dialects" an issue particularly relevant in Arabic, Aramaic, and Gurage and the strong mutual influences between Arabic dialects render a genetic subclassification of them particularly difficult.