+P Celtic refers to a branch of [Celtic languages](/wiki/celtic_languages) where the Proto-Celtic *kw* sound evolved into *p*. This feature distinguishes them from [Q Celtic](/wiki/q_celtic) languages, exemplified by Brythonic tongues such as Welsh and Breton.
+## See also
+- [Q Celtic](/wiki/q_celtic)
+- [Brythonic](/wiki/brythonic)
+- [Goidelic](/wiki/goidelic)
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