A branch of the Indo-European family of languages, which can be divided geographically and chronologically into the Continental Celtic languages and Insular Celtic. The former are generally divided into the old languages of Lepontic, Celto-Iberian, and Gaulish, which were spoken throughout much of western Europe from around 500 BC to 500 AD. The Insular Celtic group consists of the more modern Goidelic (Irish, Scottish, Gaelic, and Manx) and Brythonic (Welsh, Breton, and Cornish) branches. Celtic is currently known chiefly in the British Isles and in Brittany.