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Which Celtic literary languages belong to the Brythonic group?
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Celtic literature
Britannica editor Jeff Wallenfeldt provides an overview of the Irish language.
The Celtic literary languages that belong to the Brythonic group are:
These languages, sometimes referred to as P-Celtic, are distinguished from the Goidelic group by the development of the sound p from an ancestral Indo-European form, whereas the Goidelic languages (Irish, Scottish Gaelic, and Manx) retain a k sound. While Welsh is the best-attested of these languages, all three share a common origin and are historically associated with the island of Great Britain.2134