Yang Zhuang language

Yang Zhuang is a Tai language spoken in southwestern Guangxi, China, in Napo, Jingxi and Debao counties.
Li Jinfang (1999) suggests that the Yang Zhuang originally spoke the Buyang language, and later assimilated with other Tai-speaking peoples ("See Buyang people#History").
Distribution.
Zhuang dialects given in the county almanacs of Jingxi County, Debao County, and Napo County are listed below. This region is also known as the "Dejing" 德靖 area. All names and statistics are from the local county almanacs (县志), as quoted in Jackson et al (2012). Note that these divisions are often ethnic rather than geographic. Thus, some "Yang" peoples may actually speak non-Yang Zhuang dialects, and vice versa. Jackson (2011) shows that most Yang dialects do indeed form a distinctive subgroup against Fu (also shown to be a distinctive subgroup) and Nong.
Variants with multiple names include:
Jingxi County.
Below are the various Zhuang dialects of Jingxi County. The townships with which the most speakers of the dialect live in are also given. Only "Yang 仰" corresponds to Yang Zhuang.
Debao County.
Zhuang dialects of Debao County are:
Napo County.
Yang 央 dialects of Napo County are:
Non-Yang dialects and their distributions in Napo County are: