33.4% (1,010,300) reported that they could understand spoken Welsh, 25.9% (782,200) could read and 23.7% (717,100) could write Welsh.
Dywedodd 33.4% (1,010,300) y gallent ddeall Cymraeg llafar, gallai 25.9% (782,200) ddarllen yn Gymraeg a 23.7% (717,100) ysgrifennu’n Gymraeg.