Attapeu Province
Oi ("Oy, Oey"; also known as The, Thang Ong, Sok) is an Austroasiatic dialect 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.