High Quality Content by WIKIPEDIA articles! The Cornish revival (Cornish: Dasserghyans Kernowek) is an ongoing process to revive the use of the Cornish language in Cornwall, United Kingdom. The revival movement started in the late 19th century as a result of antiquarian and academic interest in the language, which was in massive decline, and also as a result of the Celtic revival. In 2009, UNESCO changed its classification of Cornish from `extinct` to `critically endangered`, seen as a milestone for the revival of the language.