Scottish Gaelic ( ), also known as Scots Gaelic and Gaelic, is a Goidelic language (in the Celtic branch of the Indo-European language family) native to the Gaels of Scotland. As a Goidelic language, Scottish Gaelic, as well as both Irish and Manx, developed out of Old Irish. It became a distinct spoken language sometime in the 13th century in the Middle Irish period, although a common literary language was shared by the Gaels of both Ireland and Scotland until well into the 17th century. Most of modern Scotland was once Gaelic-speaking, as evidenced especially by Gaelic-language place names. In the 2011 census of Scotland, 57,375 people (1.1% of the Scottish population aged over 3 years old) reported being able to speak Gaelic, 1,275 fewer than in 2001. The highest percentages of Gaelic speakers were in the Outer Hebrides. Nevertheless, there is a language revival, and the number of speakers of the language under age 20 did not decrease between the 2001 and 2011 censuses. Outside Scotland, a dialect known as Canadian Gaelic has been spoken in eastern Canada and Glengarry County, Ontario since the 18th century. In the 2016 national census, nearly 4,000 Canadian residents claimed knowledge of Scottish Gaelic, with a particular concentration in Nova Scotia. Scottish Gaelic is not an official language of the United Kingdom. However, it is classed as an indigenous language under the European Charter for Regional or Minority Languages, which the UK Government has ratified, and the Gaelic Language (Scotland) Act 2005 established a language-development body, . Name Aside from "Scottish Gaelic", the language may also be referred to simply as "Gaelic", pronounced in English. However, "Gaelic" also refers to the Irish language () and the Manx language (). Scottish Gaelic is distinct from Scots, the Middle English-derived language which had come to be spoken in most of the Lowlands of Scotland by the early modern era. Prior to the 15th century, this language was known as ('English') by its own speakers, with Gaelic being called ('Scottish'). Beginning in the late 15th century, it became increasingly common for such speakers to refer to Scottish Gaelic as ('Irish') and the Lowland vernacular as . Today, Scottish Gaelic is recognised as a separate language from Irish, so the word in reference to Scottish Gaelic is no longer used. History Origins Based on medieval traditional accounts and the apparent evidence from linguistic geography, Gaelic has been