Isan or Northeastern Thai (Thai: ภาษาอีสาน, ภาษาไทยถิ่นตะวันออกเฉียงเหนือ, ภาษาไทยถิ่นอีสาน, ภาษาไทยอีสาน, ภาษาลาวอีสาน) is a group of Lao varieties spoken in the northern two-thirds of Isan in northeastern Thailand, as well as in adjacent portions of northern and eastern Thailand. It is the native language of the Isan people, spoken by 20 million or so people in Thailand, a third of the population of Thailand and 80 percent of all Lao speakers. The language remains the primary language in 88 percent of households in Isan. It is commonly used as a second, third, or fourth language by the region's other linguistic minorities, such as Northern Khmer, Khorat Thai, Kuy, Nyah Kur, and other Tai or Austronesian-speaking peoples. The Isan language has unofficial status in Thailand and can be differentiated as a whole from the Lao language of Laos by the increasing use of Thai grammar, vocabulary, and neologisms. Code-switching is common, depending on the context or situation. Adoption of Thai neologisms has also further differentiated Isan from standard Lao.