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General description
The Census was held on 27 March 2011, and is a key source of information on the Welsh language. The Office for National Statistics (ONS) is responsible for the Census in Wales and England.Data collection and calculation
The 2011 Census question asked “Can you understand, speak, read or write Welsh” - answered by ticking one or more of five boxes (one for each category and one for “None of these”) in any combination. This question was only asked in Wales, and results are presented for those aged 3 and over. The Census did not collect information on fluency levels or on frequency of use.The first 2011 Census results on the Welsh language were published on 11 December 2012.
Further information about the census estimates, including details about the methodology used and information about how population subgroups are defined and estimated, is available via the 2011 Census home page.