Of those who reported being able to speak Welsh in 2021, more than half were younger than 33 years old, and three-quarters were younger than 57 years old.
O’r rhai a ddywedodd eu bod yn gallu siarad Cymraeg yn 2021, roedd dros eu hanner yn iau na 33 oed, ac roedd tri chwarter yn iau na 57 oed.