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Queyu (Choyo, Choyu) is a poorly attested Qiangic language of Yajiang County and Xinlong County, Sichuan, as well as Tibet. It is similar with and shares a name with Zhaba, but the two languages are distinct from each other.
The four dialects of Choyo are those of:
- Youlaxi Township 尤拉西乡, Xinlong County (Wang 1991; Huang ed. 1992) (which also has Western Horpa speakers)
- Rongba Township 绒坝乡, Litang County (Nishida 2008)
- Tuanjie Township 团结乡, Yajiang County (Lu 1985; Sun ed. 1991)
- Xiala Township 呷拉乡, Yajiang County (Prins & Nagano 2013) (which also has Dao speakers)
Suzuki & Wangmo (2016) consider the Lhagang Choyu language to be similar to but not part of Choyu proper, which consists of the four dialects listed above.
Lhagang Choyu (Chinese: Tagong Queyu 塔公却域語) is a Qiangic language similar to Choyu recently described by Suzuki & Wangmo (2018). It is spoken in Tage [Thabs-mkhas] Hamlet, southwestern Tagong [lHa-sgang] Town, Kangding [Dar-mdo] Municipality, Sichuan Province, China. It used to be spoken in Xiya 西雅 Hamlet of the same township (Suzuki & Wangmo 2016:63). Lhagang Choyu is an endangered language with about 100 speakers.
- Choyo at Ethnologue (18th ed., 2015)
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Queyu". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
- Suzuki, Hiroyuki and Sonam Wangmo. 2016. “Lhagang Choyu: A first look at its sociolinguistic status”. Studies in Asian Geolinguistics II: Rice. pp.60–69.
- Wang, Tianxi. 1990. “Queyuyu [Choyu]”. In Qingxia Dai, Bufan Huang, Ailan Fu, Rig-’dzin dBang-mo, and Juhuang Liu. Zangmianyu Shiwuzhong. pp.46–63. Beijing: Beijing Yanshan Chubanshe.
- Huang Bufan and Dai Qingxia, eds. 1992. Zangmianyuzu yuyan cihui 《藏緬語族語言詞匯》[A Tibeto-Burman Lexicon]. Beijing: Central Institute of Minorities.
- Sun, Jackson T.-S. 2018. The Ancestry of Horpa: Further Morphological Evidence. Taipei: Academia Sinica.
- Nishida, Fuminobu. 2008. “Tyuyugo no on-in taikei [Phonological system of Choyu]”. Tyuugoku Kenkyuu 16. pp.77–85.
- Lu, Shaozun. 1985. “Zhabayu gaikuang [Overview of Zhaba]”. Minzu Yuwen 2. pp.67–76.
- Sun Hongkai et al. 1991. Zangmianyu yuyin he cihui 藏缅语音和词汇 [Tibeto-Burman phonology and lexicon]. Chinese Social Sciences Press.
- Prins, Marielle and Yasuhiko Nagano (eds.). 2013. rGyalrongic Languages Database.
- Yeshes Vodgsal Atshogs / Yixiweisa Acuo [意西微萨・阿错]. 2004. A study of Dao [倒话研究]. Beijing: Ethnic Publishing House [民族出版社]. ISBN 978-7-105-06016-0
- Suzuki, Hiroyuki and Sonam Wangmo. 2018. “Lhagang Choyu wordlist with the Thamkhas dialect of Minyag Rabgang Khams (Lhagang, Khams Minyag)”. Asian and African Languages and Linguistics 12. pp.133–160.
- Nishida, Fuminobu. 2008. Chuyu-go no on'in taikei. Chūgoku kenkyū / Reitaku University 16. 77-85.