Of the Celtic languages spoken in the U.K , Welsh belongs to the Western Brittonic group , Irish and Scottish Gaelic both belongs to the Goidelic group and Cornish belongs to the Southwestern Brittonic group .
Four indigenous Celtic languages are spoken in the UK : Welsh belonging to the Western Brittonic group , Irish , and Scottish Gaelic both belonging to the Goidelic group , and as a second language only , Cornish which belongs to the Southwestern Brittonic group .
United Kingdom