You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Old Brythonic/Brittonic was an ancient Celtic language spoken by the britonic peoples of Britain. By the 6th century it had split into Welsh, Cumbric, Cornish, and Breton.
Sadly the language has been lost and what few sources of this mysterious language survive, are undecipherable and may not even be in Brythonic anyway!