In the remaining 1.8% (25,000) of households, there were no residents who said that English or Welsh was their main language, which is similar to 2011 (1.7%, 22,000).
Yn y 1.8% (25,000) o gartrefi a oedd yn weddill, nid oedd unrhyw breswylydd wedi dweud mai Cymraeg neu Saesneg oedd eu prif iaith, sy'n debyg i 2011 (1.7%, 22,000).