Insular Celtic refers to the version of the language spoken in what is now  England, Scotland, Ireland, Wales, and Brittany, and Continental Celtic refers to the version  spoken throughout the rest of Europe.

岛屿凯尔特语是指现在英格兰、苏格兰、爱尔兰、威尔士和布列塔尼所使用的语言版本，大陆凯尔特语是指欧洲其他地区使用的版本。