Arabic, Mesopotamian Spoken (acm-acm) = 3 (Wider communication). De facto national working language. Originated in Mesopotamia, spread throughout the Middle East. Lingua franca of the whole region before the 7th century. Used in most everyday domains.
Glottolog
[acm] at ISO 639-3
[acm] at OLAC
[acm] at IMTVault
Wikidata
Wikipedia
Arabic (Iraqi) at WALS