33.4% (1,019,700) reported that they could understand spoken Welsh, 25.7% (784,500) could read and 23.7% (723,300) could write Welsh.
Dywedodd 33.3% (1,020,800) y gallent ddeall Cymraeg llafar, gallai 25.7% (789,900) ddarllen yn Gymraeg a 23.4% (716,900) ysgrifennu’n Gymraeg.