Pyen (Hpyin, Phen) is a Loloish language of Burma. Currently, Pyen is only remembered by some elderly individuals, and is no longer understood by the younger generation, who now all speak Shan (Shintani 2009).
Pyen borrows more from Lahu and Shan, while Bisu borrows more from Northern Thai and Standard Thai. Pyen and Bisu are both mutually intelligible, since the two form a dialect chain along with Laomian and Laopin of China, and some Phunoi varieties of Laos (Person 2007).
- Pyen at Ethnologue (18th ed., 2015)
- Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Pyen". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
- Person, Kirk R. 2007. A preliminary phonological sketch of Pyen, with comparison to Bisu. Canberra: Pacific Linguistics.
- Shintani Tadahiko. 2009. The Pyen (or Phen) language: its classified lexicon. Fuchu (Tokyo-to): Research Institute for Languages and Cultures of Asia and Africa.