L1 users: 1,630,000 (2009 census).
Northeast of Ha Noi city, near China border, widespread; 15 provinces, possibly in Laos.
6b (Threatened). Language of recognized ethnic group: Tay.
Central Tày, Eastern Tày, Southern Tày, Northern Tày, Tày Trung Khanh, Thu Lao, Tày Bao Lac. Reportedly similar to Nung [nut].
Latin script [Latn].
Tày is an official ethnic community. Traditional religion, Christian.