Prai (Phray) or Phai, also known as Thin (Theen, Htin) and Kha Sam Liam, is a Mon–Khmer language of Thailand and Laos. It is one of several closely related languages which go by the names Prai and Thin, and is sometimes distinguished as Pray 1; the Ban Wen dialect has been labeled Pray 3. (Pray 2 is the Lua' language.)