The Bouyei language (autonym: Haausqyaix also spelled Buyi, Buyei, or Puyi; Chinese: 布依语; pinyin: bùyī yǔ, Vietnamese: tiếng Bố Y or tiếng Giáy) is a language spoken by the Bouyei ethnic group of southern Guizhou Province in mainland China. Classified as a member of the Northern Tai group in the Tai languages branch of the Tai–Kadai language family, the language has over 2.5 million native speakers and is also used by the Giay people (Vietnamese: Giáy) in some parts of Vietnam.