康瓦爾語 (Cornish) is a Celtic language that originated in Cornwall, England. It is part of the Brythonic branch of the Celtic languages, which also includes 威爾士語 (Welsh) and 布列塔尼語 (Breton). Although it became extinct as a first language in the 18th century, revitalization efforts began in the 20th century, leading to a growing number of speakers today. The language has a rich cultural heritage, with connections to 康瓦爾 (Cornwall) folklore, music, and literature. Various organizations promote its use in education and public life, helping to preserve and celebrate this unique aspect of 英國 (British) culture.