The Buyi language used by Buyi people is actually equivalent to the northern dialect of Zhuang language and belongs to the northern group of Taiwanese branch of Dong-Tai language family. Some foreign scholars call it "Northern Taiwanese", which is one of the main languages in China. The Buyi language in Guizhou province can be roughly divided into three dialect areas according to phonetic features: the first dialect area has the largest population, mainly distributed in Buyi and Miao Autonomous Prefecture in southwest Guizhou, and can directly communicate with Guibian dialect and Guibei dialect, a Zhuang language in northern Guangxi; The population of the second dialect area is the second, which is mainly distributed in Qiannan Buyi and Miao Autonomous Prefecture and Guiyang suburbs. It can directly talk to the first dialect area, and it is also very close to the Zhuang language in northern Guangxi. The third dialect area has the smallest population, mainly distributed in Zhenning, Guanling, Ziyun, Qinglong, Pu 'an, Liuzhi, Panxian, Shuicheng, Bijie and Weining in Guizhou Province. The pronunciation of this dialect area has unique characteristics.
1956 designed a writing scheme based on Latin alphabet and combined with Zhuang language, which is called "Buzhuang Language Alliance" for short. On the premise of maintaining the same writing form as Zhuang language, the dialect customary writing method was retained. Revised in the 1980s, it no longer conforms to Zhuang language.
Buyi language is still widely used in rural areas and some towns where Buyi people live in concentrated communities, but it has not been popularized so far for various reasons. Now the Buyi people scattered in some counties and cities have changed to Chinese as their daily language, but the proportion of Buyi people in cities and towns is not large, and Buyi people whose mother tongue is Buyi still account for more than 90% of the Buyi population. At the same time, more and more young Buyi people have learned to use Chinese skillfully and become a bilingual population of Buyi and Han.