The Siloid languages belong to the Southern Loloish (Hanoish) branch of the Sino-Tibetan language family. The Siloid branch was first proposed by Hsiu (2016).
Most Siloid languages are spoken in Phongsaly Province, northern Laos, with smaller numbers of speakers living in China (Yunnan) and Vietnam (Lai Châu Province).
Languages The Siloid languages are:
Sila Khir Cosao Paza Phana’ Wanyä Akeu Gokhy
Luma is also closely related to Akeu according to Lew (2023).
Classification The internal classifications of Siloid languages were analyzed in a 2016 computational phylogenetic lexical analysis by Hsiu (2016).Hsiu, Andrew. 2016. The classification of Cosao: a Lolo-Burmese language of China and Laos. Presented at the 22nd Himalayan Languages Symposium, Guwahati, India. Siloid Wanyä (core branch) Phusang Khir, Cosao Sila (Sida)
The Siloid classification above was subsequently revised by Hsiu (2018)Hsiu, Andrew. 2018. Classifications of some lesser-known Lolo-Burmese languages. as follows. Siloid Luma, Pala Akeu, Gokhy Wanyä (Muchi) Sila cluster: Sila, Sida Paza (Phusang) Khir, Cosao Phana
References
Lama, Ziwo Qiu-Fuyuan (2012), Subgrouping of Nisoic (Yi) Languages, thesis, University of Texas at Arlington (archived) Kingsadā, Thō̜ngphet, and Tadahiko Shintani. 1999 Basic Vocabularies of the Languages Spoken in Phongxaly, Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA). Shintani, Tadahiko, Ryuichi Kosaka, and Takashi Kato. 2001. Linguistic Survey of Phongxaly, Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA). Kato, Takashi. 2008. Linguistic Survey of Tibeto-Burman languages in Lao P.D.R. Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA).