L1 users: 886,000 (2014 J. Leclerc).
Northeast, Khorasan-e Shemali Province, northwest of Mashhad; Bojnurd area (West Quchani, Quchan area (North or Northeast Quchani, probably largest), Soltanabad area near Sabzevar (South Quchani).
West Quchani (Northwest Quchani), North Quchani (Northeast Quchani), South Quchani. Midway linguistically between Azerbaijani and Turkmen [tuk], but not a dialect of either. The Oghuz-Uzbek dialect of Uzbek, Northern [uzn] in Uzbekistan is reportedly a dialect. Different from Khorasani, a local Persian dialect in Khorasan.
Also use Iranian Persian [pes].
Arabic script, Nastaliq variant [Aran].