|Native to||China, Laos|
Piyo (Biyo, Biyue; pi31 jɔ31 (Jing 2015:11)) is a Loloish language of China. The people are ethnic Hani, and the "Bi-Ka" varieties (Biyo, Kaduo, Enu) are traditionally considered dialects of Hani. However, in the classifications of Bradley (2007) and Lama (2012), they are more distinct from Hani than other related languages are. Lama classifies Mpi as closer to Biyo dialect than Kaduo is.
In Mojiang County, the Upper Biyo (a31 tʰa̱31 pi31 jɔ31) and Lower Biyo (a31 va̱31 pi31 jɔ31) varieties are mutually intelligible (Jing 2015:11).
- Jiang Ying [蒋颖], Cui Xia [崔霞], Qiao Xiang [乔翔]. 2009. A study of Ximoluo [西摩洛语研究]. Beijing: Ethnic Publishing House [民族出版社].
- Jing Dian [经典] (2015). A reference grammar of Mojiang Biyo Hani [墨江碧约哈尼语参考语法]. Beijing: China Social Sciences Academy Press [中国社会科学出版社]. ISBN 9787516172131
- Zhu Maoyun [朱茂云] (2011). A reference grammar of Mojiang Kaduo [墨江哈尼族卡多话参考语法]. Beijing: China Social Sciences Academy Press [中国社会科学出版社].