Classical Gaelic (; Irish: Gaeilge Chlasaiceach) is the term used in Scotland for the shared literary form that was in use in Scotland and Ireland 13th to the 18th century.Ó Maolalaigh, R. Scottish Gaelic in Twelve Weeks (2008) Birlinn ISBN 978-1-84158-643-4 The language is that of Early Modern Irish (also known as Classical Irish but not to be confused with Classical Old Irish). Although the first written signs of Scottish Gaelic having diverged from Early Modern Irish appear as far back as the 12th century annotations of the Book of Deer, Scottish Gaelic did not appear in writing or print on a significant scale until the 1767 translation of the New Testament into Scottish Gaelic.Thomson, D. (ed.) The Companion to Gaelic Scotland (1994) Gairm ISBN 1-871901-31-6
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Ethnologue gives the name "Hiberno-Scottish Gaelic" (and the ISO 639-3 code <code>ghc</code>) as a cover term for Classical Gaelic and Early Modern Irish.