In 2021, children and young people aged 5 to 15 years old were more likely to be reported as being able to speak Welsh than any other age group, consistent with findings from previous censuses.
Yn 2021, roedd plant a phobl ifanc 3 i 15 oed yn fwy tebygol o gael eu nodi fel eu bod yn gallu siarad Cymraeg nag unrhyw grŵp oedran arall, ac mae hyn yn gyson â chanfyddiadau cyfrifiadau blaenorol.