Manx is extinct since 1974. It was spoken on the island of Man as early as the fifth century CE.

The language is closer to Scottish Gaelic than to Irish Gaelic. Norse influence is evident.

Little is known of the linguistic history of the Isle of Man. A strong Scandinavian influence is evident in the place names and the language. The language is first written in the Book of Common Prayer (1610). Manx is an Irish dialect. Its sound system is undetermined because its written orthography is based upon English.
The language was far advanced into decay at the time of the first scientific study. Documents show that verbal flexion and declension had been largely abandoned and replaced by constructions using the verbal noun. There are no native speakers, the last, Ned Maddrell, died in 1974.