The Insular
Celtic hypothesis concerns the origin of the Celtic languages. The six Celtic languages of modern times can be divided into: the
Goidelic languages (
Irish,
Manx, and
Scottish Gaelic); and the
Brythonic languages (
Breton,
Cornish and
Welsh).The term "Insular" refers to the place of origin of these languages, the
British Isles, in contrast to the (now extinct)
Continental Celtic languages of
mainland Europe and
Anatolia. There is a theory that the Brythonic and Goidelic languages
evolved together in those islands, having a
common ancestor more recent than any shared with the
Continental Celtic languages such as
Celtiberian,
Gaulish, Galatian and
Lepontic, among others, all of which are long
extinct.
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