Cofán or Kofán, known in the language itself as Aʼingae, is the primary language of the Cofán people, an indigenous group whose ancestral territory lies at the interface between the Andean foothills and Amazonia in the northeast of Ecuador (Sucumbíos province) and southern Colombia (Putumayo and Nariño provinces), who call themselves the Aʼi. Although still robustly learned by children in Ecuadorian communities, Cofán is considered an 'endangered' language with estimates of around 1,500 native speakers.

While past classifications have identified Cofán as belonging to linguistic families such as Chibchan or Andean B, it is now widely agreed to be a language isolate, with no known genetic relatives.

Aʼingae is a language isolate of Amazonia spoken by the Cofán people in Sucumbios Province in northeastern Ecuador and the departments of Putumayo and Nariño in southern Colombia. The language has approximately 1500 speakers and is relatively vital in Ecuador and severely endangered in Colombia. However, language attitudes about Aʼingae are positive and it is considered foundational to Cofán identity and community (Cepek 2012).

The Aʼi are traditionally hunter-gatherers who historically spanned over a large territory (AnderBois et al. 2019). In Ecuador, the Cofán have resisted conquest by the Inca and colonization by the Spanish, as well as anti-indigenous policies by the Ecuadorian government. The pre-Colombian Cofán population is estimated at 60,000 to 70,000. Though the origin of the Cofán is the Eastern Andean Cordilleras, Inca encroachment pushed the Cofán to the eastern lowlands, which they still inhabit today. The Cofán have undergone de facto segregation codified by the Ecuadorian government, a measles outbreak in 1923 that reduced the population to a few hundred, and illegal oil extraction that threatened the environment in Cofán territory and the Cofán way of life. The Cofán have played a major role in the Indigenous movement in Ecuador, and in 2018 they won a judicial case recognizing their right to decide over environmental activities in their territory and prohibiting the continued operation of mining activities.

The Cofán's religious tradition is shamanistic, and a key cultural value of the Cofán is harmonious conviviality. In addition, participation in cultural practices such as drinking yaje and traditional skills like hunting and housebuilding, rather than descent or ethnicity, plays a large role in determining one's status as an aʼi (Cepek 2012). The Cofán credit their strong linguistic identity for their ability to withstand colonial oppression and protect their traditional way of life.

Aʼingae is a language isolate. The language has considerable Amazonian borrowings from Tukanoan and Cariban languages, as well as many Quechuan borrowings. While there have been previous claims of genetic ties or language contact of Aʼingae to Barbacoan, Chicham, and Chibchan, it has been determined that there are no substantial borrowings. No complete grammar of the language has been produced.

The name of the language, Aʼingae, which consists of the stem aʼi ('person, Cofán person, civilized person') and the manner clitic =ngae, means 'in the manner of the people'. Though the speakers use the word Aʼingae, the language is also known by the Spanish denomination Cofán.

Aʼingae has 27 consonants as well as 5 oral monophthongs and 6 oral diphthongs, each with a nasal counterpart which is contrastive. The language is currently considered to have an unknown amount of dialectal variation. It is quite likely that there is some, but no concrete research and evidence has been put forward to make a strong claim either way, warranting further investigation.