The "White" ethnic group and "Mixed or Multiple ethnic groups" have the highest percentages, though these groups saw a reduction in the percentage of speakers since 2011.
Y grwpiau ethnig "Gwyn" a "Grwpiau cymysg neu amlethnig" sydd â'r canrannau uchaf, er i'r grwpiau hyn weld gostyngiad yng nghanran y siaradwyr ers 2011.