In Wales, 96.7% of usual residents (2.9 million) aged three years and over spoke English or Welsh as their main language, slightly down from 97.1% in 2011.
Yng Nghymru, roedd 96.7% o breswylwyr arferol (2.9 miliwn) tair oed a throsodd yn siarad Cymraeg neu Saesneg fel eu prif iaith, i lawr ychydig o 97.1% yn 2011.