Extinct language
An extinct language (or dead language) is a language that failed to recover from language death and is therefore no longer naturally spoken by anyone as a first language nor as an additional language. A dormant language is a dead language that still serves as a core component of an existing ethnic or religious group's identity—such languages are often undergoing revitalization. By contrast, a language that is still naturally spoken as a first language is classified as a modern or living language. Once a living language enters the process of language death, it is classified as an endangered language and remains in this state until extinction or revitalization.
Languages have typically become extinct as a result of the process of cultural assimilation leading to language shift, and the gradual abandonment of a native language in favor of a foreign lingua franca.
As of the 2000s, a total of roughly 7,000 natively spoken languages existed worldwide. Most of these are minor languages in danger of extinction; one estimate published in 2004 expected that some 90% of the languages spoken at that time will have become extinct by 2050.