Regional languages and statistics

UK speakers, in the 2011 census, 59,824,194 (over the age of three) 98%.

English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria. Following the economic, political, military, scientific, cultural, and colonial influence of Great Britain and the United Kingdom from the 18th century, via the British Empire, and of the United States since the mid-20th century, it has been widely dispersed around the world, become the leading language of international discourse. Historically, English originated from the fusion of languages and dialects, now collectively termed Old English, which were brought to the eastern coast of Great Britain by Germanic (Anglo-Saxon) settlers beginning in the 5th century – with the word "English" being derived from the name of the Angles. A significant number of English words are constructed based on roots from Latin, because Latin in some form was the lingua franca of the Christian Church and of European intellectual life. The language was further influenced by the Old Norse language with Viking invasions in the 8th and 9th centuries. The Norman conquest of England in the 11th century gave rise to heavy borrowings from Norman French, and vocabulary and spelling conventions began to give the superficial appearance of a close relationship with Romance languages to what had now become Middle English. The Great Vowel Shift that began in the south of England in the 15th century is one of the historical events marking the separation of Middle and Modern English.

Welsh (Cymraeg) emerged in the 6th century from Brittonic, the common ancestor of Welsh, Breton, Cornish, and the extinct language known as Cumbric. Welsh is thus a member of the Brythonic branch of the Celtic languages, and is spoken natively in Wales and by some along the Welsh border in England. There are also Welsh speakers in Y Wladfa (The Colony), a Welsh settlement in Argentina, which began in 1865 and is situated mainly along the coast of Chubut Province in the south of Patagonia. Chubut estimates the number of Patagonian Welsh speakers to be about 1,500, while other estimates put the number at 5,000.

The Welsh language is officially protected by the Welsh Language Act 1993 and the Government of Wales Act 1998, and since 1998 it has been common, for example, for almost all British Government Departments to provide both printed documentation and official websites in both English and Welsh. Both the English and Welsh languages have equal status in Wales according to law. On 7 December 2010, the National Assembly for Wales unanimously approved a set of measures to develop the use of the Welsh language within Wales. On 9 February 2011, this measure received Royal Assent and was passed, thus making the Welsh language an officially recognised language within Wales.

The Welsh Language Board indicated in 2004 that 553,000 people (19.7% of the population of Wales in households or communal establishments) were able to speak Welsh. Based on an alternative definition, there has been a 0.9 percentage point increase when compared with the 2001 census, and an increase of approximately 35,000 in absolute numbers within Wales. Welsh is therefore a growing language within Wales. Of those 553,000 Welsh speakers, 57% (315,000) were considered by others to be fluent, and 477,000 people consider themselves fluent or "fair" speakers. 62% of speakers (340,000) claimed to speak the language daily, including 88% of fluent speakers.

However, there is some controversy over the actual number who speak Welsh: some statistics include people who have studied Welsh to GCSE standard, many of whom could not be regarded as fluent speakers of the language. Conversely, some first-language speakers may choose not to report themselves as such. These phenomena, also seen with other minority languages outside the UK, make it harder to establish an accurate and unbiased figure for how many people speak it fluently. Furthermore, no question about Welsh language ability was asked in the 2001 census outside Wales, thereby ignoring a considerable population of Welsh speakers – particularly concentrated in neighbouring English counties and in London and other large cities.

Nevertheless, the 2011 census recorded a drop of Welsh speakers overall, from 582,000 in 2001 to 562,000 in 2011, despite an increase in the size of the population—a 2% drop (from 21% to 19%) in the proportion of Welsh speakers. An estimated 110,000 to 150,000 people speak Welsh in England.

Scottish Gaelic is a Celtic language native to Scotland. A member of the Goidelic branch of the Celtic languages, Scottish Gaelic, like Modern Irish and Manx, developed out of Middle Irish, and thus descends ultimately from Primitive Irish. Outside Scotland, a dialect of the language known as Canadian Gaelic exists in Canada on Cape Breton Island and isolated areas of the Nova Scotia mainland. This variety has around 2000 speakers, amounting to 1.3% of the population of Cape Breton Island.

The 2011 census of Scotland showed that a total of 57,375 people (1.1% of the Scottish population aged over three years old) in Scotland could speak Gaelic at that time, with the Outer Hebrides being the main stronghold of the language. The census results indicate a decline of 1,275 Gaelic speakers from 2001. A total of 87,056 people in 2011 reported having some facility with Gaelic compared to 93,282 people in 2001, a decline of 6,226. Despite this decline, revival efforts exist and the number of speakers of the language under age 20 has increased.

The Gaelic language was given official recognition for the first time in Scotland in 2005, by the Scottish Parliament's Gaelic Language (Scotland) Act 2005, which aims to promote the Gaelic language to a status "commanding equal respect" with English. However, this wording has no clear meaning in law, and was chosen to prevent the assumption that the Gaelic language is in any way considered to have "equal validity or parity of esteem with English".A major limitation of the act, though, is that it does not constitute any form of recognition for the Gaelic language by the UK government, and UK public bodies operating in Scotland, as reserved bodies, are explicitly exempted from its provisions.

The Scots language originated from Northumbrian Old English. The Anglo-Saxon Kingdom of Northumbria stretched from south Yorkshire to the Firth of Forth from where the Scottish elite continued the language shift northwards. Since there are no universally accepted criteria for distinguishing languages from dialects, scholars and other interested parties often disagree about the linguistic, historical and social status of Scots. Although a number of paradigms for distinguishing between languages and dialects do exist, these often render contradictory results. Focused broad Scots is at one end of a bipolar linguistic continuum, with Scottish Standard English at the other. Consequently, Scots is often regarded as one of the ancient varieties of English, but with its own distinct dialects. Alternatively Scots is sometimes treated as a distinct Germanic language, in the way Norwegian is closely linked to, yet distinct from, Danish.

The 2011 UK census was the first to ask residents of Scotland about Scots. A campaign called Aye Can was set up to help individuals answer the question. The specific wording used was "Which of these can you do? Tick all that apply" with options for 'Understand', 'Speak', 'Read' and 'Write' in three columns: English, Scottish Gaelic and Scots. Of approximately 5.1 million respondents, about 1.2 million (24%) could speak, read and write Scots, 3.2 million (62%) had no skills in Scots and the remainder had some degree of skill, such as understanding Scots (0.27 million, 5.2%) or being able to speak it but not read or write it (0.18 million, 3.5%).There were also small numbers of Scots speakers recorded in England and Wales on the 2011 Census, with the largest numbers being either in bordering areas (e.g. Carlisle) or in areas that had recruited large numbers of Scottish workers in the past (e.g. Corby or the former mining areas of Kent)

Cornish (Kernewek), a Brythonic Celtic language closely related to Welsh, was the dominant language of Cornwall throughout the Middle Ages but began to decline after the 14th century, especially after the Prayer Book Rebellion in 1549. The language continued to function as the native language of Penwith in the far west of Cornwall until the late 18th century. The Cornish language was also used by some degree by fishermen in Mousehole (Porthynys) right up to the 1940s.

Today it is spoken to some extent by roughly 3,500 people as a result of a revival initiated by Henry Jenner in 1903. Since 2002 the Cornish language has been recognised by the United Kingdom government as a UK official minority language under the Council of Europe's European Charter for Regional or Minority Languages. The Cornish Language Strategy project commissioned research to provide quantitative and qualitative evidence for the number of Cornish speakers: due to the success of the revival project it was estimated that 2,000 people were fluent (surveyed in spring 2008), an increase from the estimated 300 people who spoke Cornish fluently suggested in a study by Kenneth MacKinnon in 2000