泰语
Isan is known in Thai by the following two names used officially and academically: "Phasa Thai Tawan Ok Chiang Neua" ( ), 'Northeastern Thai language', or "Phasa Thai Thin Isan" ( ), 'Thai language of the Isan region'. These names emphasise the official position of Isan speech as a dialect of the Thai language. In more relaxed contexts, Thai people generally refer to the language as "Phasa Thai Isan" (), the 'Isan Thai language' or simply "Phasa Isan" (, ), 'Isan language'.