The Cornish language is a Celtic language spoken in Cornwall in the south west of England. It is a member of the Brittonic branch of the Celtic languages, which also includes Welsh and Breton. The earliest known written record of the Cornish language dates from the 9th century AD, but there is evidence that the language was spoken much earlier.
The Cornish language was once spoken widely in Cornwall, but by the 19th century it was no longer the everyday language of most people in the county. In the 20th century, the number of speakers declined further, and by the 21st century there were only a few hundred people who could speak Cornish fluently. However, there has been a revival of the language in recent years, and there are now several thousand people who are learning or trying to learn Cornish.
Cornish is a difficult language for English speakers to learn, as it has a completely different grammar and vocabulary. However, it is possible to learn basic Cornish, and there are a number of resources available to help people who want to do so.
If you're interested in learning Cornish, or in finding out more about the language and its history, there are a number of websites, books and other resources that can help you.