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1 (National). De facto national language. 55,600,000 in United Kingdom (European Commission 2012). Population total all countries: 335,491,748. L2 users: 1,500,000 in United Kingdom (Crystal 2003). L2 users worldwide: 505,000,000.
2 (Provincial). De facto provincial language in Wales. 508,000 in United Kingdom (1991 census), decreasing. Population total all countries: 536,890. 32,700 monolinguals (1971 census).
3 (Wider communication)
3 (Wider communication).Widely used as L2 in all parts of Northern Ireland. 116,000 in United Kingdom (2001 census).
4 (Educational). Statutory provincial language in Scotland (2005, Gaelic Language (Scotland) Act). 58,700 in United Kingdom (2001 census). Population total all countries: 63,130.
5 (Dispersed). L2 users: 12,000,000 in United Kingdom (European Commission 2012).
British Sign Language
5 (Developing). 77,000 (2014 EUD). L2 users: 250,000 (2013 K. Crombie Smith). 310,000 (2014 IMB).
5 (Developing). 4,100 in United Kingdom (2004).
5 (Developing). 90,000 in United Kingdom (1999 B. Kay). 60,000 in Lallans, 30,000 in Doric. Population total all countries: 100,000. L2 users: 1,500,000 in United Kingdom.
6a (Vigorous). 90,000 in United Kingdom (Hancock 1990). Population total all countries: 197,900.
6a (Vigorous). 4,000 in United Kingdom.
9 (Reawakening). No known L1 speakers, but emerging L2 speakers. Ethnic population: 532,000 (2011 census). L2 users: A few L2 speakers in Canada, Australia, Austria, and Brittany (France).
9 (Second language only)
9 (Second language only). No known L1 speakers.