The Goidelic or Gaelic languages (, , ) form one of the two groups of Insular Celtic languages, the other being the Brittonic languages. In the older classification, the Goidelic languages are part of the Q-Celtic group.

Scottish Gaelic, sometimes also referred to as Gaelic ( ), is a Celtic language native to Scotland. A member of the Goidelic branch of the Celtic languages, Scottish Gaelic, like Modern Irish and Manx, developed out of Middle Irish, and thus is ultimately descended from Old Irish.