Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Oi (Oy, Oey; also known as The, Thang Ong, Sok) is an Austroasiaticdialect cluster of Attapeu Province, southern Laos. The dominant variety is Oy proper, with 11,000 speakers who are 80% monolinguals. The Jeng (Cheng) speak the same language but are ethnically distinct (Sidwell 2003). Speakers follow traditional religions.
Distribution
Some locations where Oi is spoken in include (Sidwell 2003:26):
Ban Inthi, 25 km southwest of Attapeu; speakers claim to have migrated from the Bolaven Plateau about 80 years ago, around the time of the Ong Kommandam Rebellion.
Ban Mai, at the southern slope of the Bolaven Plateau
Ban Champao, at the southern slope of the Bolaven Plateau
Sepian forest, as far as the Khampo River
The Jeng live mostly along the banks of the Sekaman River, in and around Ban Fandeng (Phandɛŋ).
According to Daniell (2020), there are about 20 Oy villages in Attapeu Province, Laos. The following villages are ordered roughly from west to east, and are located along or near the Sekong River, in an area of Attapeu Province to the west of Attapeu Town.
Thasengchan
Thahintai
Bok
Moung
Thaouan
Thabok
Donesoung
Inthii
Chomphoy
Somsouk
Khang
Hom
Tamoloey
Khemsang
Champao
Lanyao (Lagnao)
Kayeu
Konghang
Sok
Sapuan
References
^ Oy at Ethnologue (18th ed., 2015) (subscription required) Sapuan at Ethnologue (18th ed., 2015) (subscription required)
Sok at Ethnologue (18th ed., 2015) (subscription required)
Jeng at Ethnologue (18th ed., 2015) (subscription required)