The third group of the Celtic subfamily is Goidelic, to which Irish (also called Irish Gaelic), Scots Gaelic, and Manx belong. The term Erse is used as a synonym for Irish and sometimes even for Scots Gaelic. All the modern Goidelic tongues are descendants of the ancient Celtic speech of Ireland. It is thought that the Celtic idiom first came to Ireland shortly before the Christian era. An official language of Ireland, Irish is spoken natively by approximately 75,000 people; roughly a third of Ireland's population can speak and understand it to some degree. Most speakers of Irish also use English (see Irish language).
Scots Gaelic is the tongue of about 60,000 persons in the Highlands of Scotland and an additional 3,000 in Canada. Most of these people also speak English. Gaelic speech began to reach Scotland in the late 5th cent. A.D., when it was brought by the Irish invaders of that country. However, a truly distinctive Scots Gaelic did not appear before the 13th cent. The chief difference between Scots Gaelic and Irish results from the substantial Norse influence on the former. There are four cases for the noun (nominative, genitive, dative, and vocative) in Scots Gaelic, which uses the Roman alphabet (see Gaelic literature).
Manx is a dialect of Scots Gaelic that was once spoken on the Isle of Man, but it has almost entirely died out there. First recorded in writing in the early 17th cent., Manx does not have an important literature. It is written in the Roman alphabet and shows a strong Norse influence.
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