Dead Languages of the World
A language is called a dead language when it is no longer spoken by people as their main language. In contrast to extinct languages that cease to have any speakers, dead languages may continue to be used in legal, scientific and religious fields. Besides Latin, Sanskrit, Biblical Hebrew, Coptic, Avestan and Old Church Slavonic among others are dead languages which are largely used for religious functions.
An extinct language is a language that no longer has any speakers or that is no longer in current use. Extinct languages are sometimes contrasted with dead languages, which are still known and used in special contexts in written form, but not as ordinary spoken languages for everyday communication. However, language extinction and language death are often equated.