| Language | Endonym | Geographic Area | Source | Legal Recognition | Legal Document | Source | National Number | Bases for Calculation | Estimation Date | Source | Endangerment Level |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
British Sign Language (BSL) Sign Language |
British Sign Language | England, Scotland, Wales | 2022 | British Sign Language Act | / | 21 635 (given) | Main language | 2021 | 6b (Threatened) | ||
|
No official language ('De facto' Official Language: English) Germanic |
English | Wales, Scotland, Northern Ireland | 1535 / 1707 / 1800 | Public Act, 27 Henry VIII, c. 26 (An Act for Laws and Justice to be ministered in Wales in like Form as it is in this Realm ['Union of Wales']) / Acts of Union 1707 / An Act for the Union of Great Britain and Ireland | / | Approx. 56 700 000 (all UK, given) | Proficient users | 2021 | 1 (National) |
| Language | Endonym | Geographic Area | Source | Legal Recognition | Legal Document | Source | National Number | Bases for Calculation | Estimation Date | Source | Endangerment Level | ECRML level |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Cornish Celtic |
Kernewek / Kernowek | Predominantly in Cornwall | 2002 | ECRML | / | 567 (given) | Main language | 2021 | 9 (Reawakening) | Part II & Part III | ||
|
Irish Celtic |
Gaeilge | Northern Ireland; spread throughout with the largest concentration in the greater Belfast area | 2022 | Identity and Language (Northern Ireland) Act 2022 | / | Approx. 228 600 (given) | Some Irish ability | 2021 | 6b (Threatened) | Part II & Part III | ||
|
Manx Gaelic Celtic |
Gaelg | Sprea across the Isle of Man | 1985 (first step) | Report of the Select Committee on the Greater Use of Manx Gaelic | / | 8 (given) | Main language | 2021 | 9 (Reawakening) | Part II & Part III | ||
|
Scots Germanic |
Scots | Scotland; throughout | 2025 | Scottish Languages Act | / | Approx. 1 500 000 (given) | Speakers | 2011 | 5 (Developing) | Part II | ||
|
Scottish Gaelic Celtic |
Gàidhlig | Scotland; largest concentrations of Gaelic speakers are found in Na h-Eileanan an Iar (the Western Isles), the Highlands, and Argyll. Significant concentrations in the urban areas of Glasgow, Edinburgh, Aberdeen and Inverness | 2025 | Scottish Languages Act | / | Approx. 57 000 (given) | Speakers | 2011 | 2 (Provincial) | Part II & Part III | ||
|
Ulster Scots Germanic |
Ulstèr-Scotch | Parts of Northern Ireland and in Donegal in Ireland | 1998 | The Belfast Agreement (Good Friday Agreement) | / | 16 (given) | Main language | 2021 | Listed under 'Scots' - 5 (Developing) | Part II | ||
|
Welsh Celtic |
Cymraeg | Across the whole of Wales. The highest proportions of Welsh speakers are found in Gwynedd, the Isle of Anglesey and Ceredigion | 1993 | Welsh Language Act | / | Approx. 538 000 (given) | Speakers | 2021 | 2 (Provincial) | Part II & Part III |
| Language | Endonym | Geographic Area | Source | Legal Recognition | Legal Document | Source | National Number | Bases for Calculation | Estimation Date | Source | Endangerment Level |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Angloromani Indo-Aryan |
Romanes | Scattered | / | / | / | 2 100 | Users | 2021 | 6a* (Vigorous) | ||
|
Baltic Romani Indo-Aryan |
Roma | / | / | / | / | 58 460 (total) | Speakers | 2026 (Website accessed) | Vulnerable | ||
|
Carpathian Romani Indo-Aryan |
Central Romani | / | / | / | / | 472 470 (total) | Speakers | 2026 (Website accessed) | At risk | ||
|
Eastern Yiddish Germanic |
Yidish | Hackney, Haringey, and Salford counties | / | / | / | 5 340 | Users | 2021 | 5* (Developing) | ||
|
French Romance |
Français | Scattered | / | / | / | 12 935 000 | Users | 2021 | 5* (Dispersed) | ||
|
German Germanic |
Deutsch | Scattered | / | / | / | 4 058 100 | Users | 2021 | 5* (Dispersed) | ||
|
Guernésiais Romance |
Dgernesiais | Guernsey, Alderney, Herm, and Sark islands | / | / | / | 200 | Speakers | 2014 | 8b (Nearly extinct) | ||
|
Jèrriais Romance |
Jèrriais | Jersey | 2019 | JÈRRIAIS: PROMOTION BY THE PUBLIC SECTOR (P.143/2018) – AMENDMENT | / | 2 874 | Speakers | 2026 (Website accessed) | Threatened | ||
|
Norn Germanic |
Norn | Highland council area: Caithness; Orkney Islands; Shetland Islands | / | / | / | No known L1 speakers | / | / | 9 (Dormant) | ||
|
Polari Cant |
Palare | Scattered | / | / | / | No known L1 speakers | / | / | 9 (Second language only) | ||
|
Shelta Cant |
De Gammon | Scattered in Northern Ireland; major cities of England and Scotland | / | / | / | 16 700 | Users | 2008 | 6a* (Vigorous) | ||
|
Sinte Romani Indo-Aryan |
Romanes | / | / | / | / | 318 920 (total) | Speakers | 2026 (Website accessed) | At risk | ||
|
Traveller Scottish Cant |
Scots-Romani | Major cities | / | / | / | 460 | Users | 2011 | 6b* (Threatened) | ||
|
Welsh Romani Indo-Aryan |
Romnimus | England and Wales, scattered | / | / | / | No known L1 speakers | / | / | 9 (Dormant) |
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