41.0% of Conwy's usual residents who were born in Wales were able to speak Welsh (a decrease of 3.6 percentage points from 2011)
roedd 41.0% o drigolion arferol Conwy oedd wedi'u geni yng Nghymru yn gallu siarad Cymraeg (gostyngiad o 3.6 pwynt canran ers 2011)