A language isolate is a language that has no demonstrable genetic relationship with another language. Basque in Europe, Ainu in Asia, Sandawe in Africa, Haida and Zuni in North America, Kanoê in South America, and Tiwi in Australia are all examples of language isolates. The exact number of language isolates is yet unknown due to insufficient data on several languages.
An endangered language or moribund language is a language that is at risk of disappearing as its speakers die out or shift to speaking other languages. Language loss occurs when the language has no more native speakers and becomes a "dead language". If no one can speak the language at all, it becomes an "extinct language". A dead language may still be studied through recordings or writings, but it is still dead or extinct unless there are fluent speakers. Although languages have always become extinct throughout human history, they are currently dying at an accelerated rate because of globalization, mass migration, cultural replacement, imperialism, neocolonialism and linguicide.
An extinct language is a language that no longer has any first-language or second-language speakers, especially if the language also has no living descendants. In contrast, a dead language is a language that no longer has any first-language speakers, but does have second-language speakers, such as Latin. A dormant language is a dead language that still serves as a symbol of ethnic identity to an ethnic group; these languages are often undergoing a process of revitalisation. Languages that have first-language speakers are known as modern or living languages to contrast them with dead languages, especially in educational contexts.
Lists of endangered languages are mainly based on the definitions used by UNESCO. In order to be listed, a language must be classified as "endangered" in a cited academic source. Researchers have concluded that in less than one hundred years, almost half of the languages known today will be lost forever. The lists are organized by region.
Language revitalization, also referred to as language revival or reversing language shift, is an attempt to halt or reverse the decline of a language or to revive an extinct one. Those involved can include linguists, cultural or community groups, or governments. Some argue for a distinction between language revival and language revitalization. There has only been one successful instance of a complete language revival, the Hebrew language, creating a new generation of native speakers without any pre-existing native speakers as a model.
The Iroquoian languages are a language family of indigenous peoples of North America. They are known for their general lack of labial consonants. The Iroquoian languages are polysynthetic and head-marking.
In linguistics, language death occurs when a language loses its last native speaker. By extension, language extinction is when the language is no longer known, including by second-language speakers, when it becomes known as an extinct language. A related term is linguicide, the death of a language from natural or political causes, and, rarely, glottophagy, the absorption or replacement of a minor language by a major language.
The UNESCO Atlas of the World's Languages in Danger was an online publication containing a comprehensive list of the world's endangered languages. It originally replaced the Red Book of Endangered Languages as a title in print after a brief period of overlap before being transferred to an online only publication.
Gorum, or Parengi, is a nearly-extinct minor Munda language of India.
