33.3% (1,020,800) reported that they could understand spoken Welsh, 25.7% (789,900) could read and 23.4% (716,900) could write in Welsh.
Dywedodd 33% (992,500) y gallent ddeall Cymraeg llafar, gallai 26% (774,700) ddarllen yn Gymraeg a 23% (710,000) ysgrifennu’n Gymraeg