You identify a good issue - what constitutes "I can speak Welsh"?
I'm a saesneg immigrant to Carmarthenshire, and am learning Cymraeg. Am I, or am I not a Welsh speaker? Since I'm not "fluent", the (yes/no) census answer is "no". I wonder what would happen to the statistics if the census question was more of a Likert scale?
@Henrysbridge @oggybloggyogwr Main issue is inflated % amongst <18 year-olds. See https://statiaith.com/blog/yn-gallu-siarad-cymraeg-yn-ol-awdurdod-lleol-a-grwp-oed-hyblyg/ #Census2021 #Welsh
This is a very interesting set of plots to play with. The sudden drop at about 18 is interesting. Is this a legacy of educational initiatives "working through", or do we need to factor in people leaving Wales at 18? If the latter, it's interesting (and disturbing) that it's the Welsh speakers who are leaving.
@Henrysbridge @oggybloggyogwr Mainly education related: effect of inclusion of compulsory 2nd language Welsh in National Curriculum https://gwerddon.cymru/storfa-erthyglau/goblygiadau-newid-ym-mhroffeil-oedran-siaradwyr-cymraeg/
Welsh speakers less likely to migrate. Ref: Jones, H. M. 2010. Welsh speakers: age profile and out-migration. In: Morris, D. eds. . Welsh in the Twenty-first Century. Cardiff, UK: University of Wales Press, pp. 118-147