Irish language

Irish (Standard Irish: Gaeilge), also known as Irish Gaelic or simply Gaelic (/ˈɡeɪlɪk/ ^ⓘ GAY-lik), is a Celtic language of the Indo-European language family that belongs to the Goidelic languages and further to Insular Celtic, and is indigenous to the island of Ireland. It was the majority of the population's first language until the 19th century, when English gradually became dominant, particularly in the last decades of the century, in what is sometimes characterised as a result of linguistic imperialism.

Today, Irish is still commonly spoken as a first language in Ireland's Gaeltacht regions, in which 2% of Ireland's population lived in 2022.

The total number of people (aged 3 and over) in Ireland who declared they could speak Irish in April 2022 was 1,873,997, representing 40% of respondents, but of these, 472,887 said they never spoke it and a further 551,993 said they only spoke it within the education system. Linguistic analyses of Irish speakers are therefore based primarily on the number of daily users in Ireland outside the education system, which in 2022 was 20,261 in the Gaeltacht and 51,707 outside it, totalling 71,968. In the 2021 census of Northern Ireland, 43,557 individuals stated they spoke Irish on a daily basis, 26,286 spoke it on a weekly basis, 47,153 spoke it less often than weekly, and 9,758 said they could speak Irish, but never spoke it. From 2006 to 2008, over 22,000 Irish Americans reported speaking Irish as their first language at home, with several times that number claiming "some knowledge" of the language.

For most of recorded Irish history, Irish was the dominant language of the Irish people, who took it with them to other regions, such as Scotland and the Isle of Man, where Middle Irish gave rise to Scottish Gaelic and Manx. It was also, for a period, spoken widely across Canada, with an estimated 200,000–250,000 daily Canadian speakers of Irish in 1890. On the island of Newfoundland, a unique dialect of Irish developed before falling out of use in the early 20th century.

With a writing system, Ogham, dating back to at least the 4th century AD, which was gradually replaced by Latin script since the 5th century AD, Irish has one of the oldest vernacular literatures in Western Europe. On the island, the language has three major dialects: Connacht, Munster, and Ulster Irish. All three have distinctions in their speech and orthography. There is also An Caighdeán Oifigiúil, a standardised written form devised by a parliamentary commission in the 1950s. The traditional Irish alphabet, a variant of the Latin alphabet with 18 letters, has been succeeded by the standard Latin alphabet (albeit with 7–8 letters used primarily in loanwords).

Irish has constitutional status as the national and first official language of the Republic of Ireland, and is also an official language of Northern Ireland and among the official languages of the European Union. The public body Foras na Gaeilge is responsible for the promotion of the language throughout the island. Irish has no regulatory body but An Caighdeán Oifigiúil, the standard written form, is guided by a parliamentary service and new vocabulary by a voluntary committee with university input.

In An Caighdeán Oifigiúil ("The Official [Written] Standard") the name of the language is Gaeilge, from the south Connacht form, spelled Gaedhilge prior the spelling reform of 1948, in which the silent ⟨dh⟩ was removed. Gaedhilge was originally the genitive of Gaedhealg, the form used in Classical Gaelic. Older spellings include Gaoidhealg [ˈɡeːʝəlˠəɡ] in Classical Gaelic and Goídelc [ˈɡoiðʲelɡ] in Old Irish. Goidelic, used to refer to the language family, is derived from the Old Irish term.

Endonyms of the language in the various modern Irish dialects include: Gaeilge [ˈɡeːlʲɟə] in Galway, Gaeilg/Gaeilic/Gaeilig [ˈɡeːlʲəc] in Mayo and Ulster, Gaelainn/Gaoluinn [ˈɡeːl̪ˠən̠ʲ] in West Cork and Kerry (Munster), as well as Gaedhealaing in mid- and eastern Munster (Waterford and parts of Cork and Kerry), to reflect local pronunciation.