The term GAELS refers to a group of people who share a common cultural identity. The CELTS and the Erse are two distinct groups of Gaels. The CELTS are an ancient Indo-European people who lived in parts of Europe, including Ireland, Scotland, Wales, and Brittany. The Erse are a group of people who speak the Irish language and are primarily found in Ireland. Both the CELTS and the Erse are considered to be part of the Gaelic culture.