The proportion of the population born in Wales who are able to speak Welsh is approximately three times larger than the proportion of the population born outside of Wales who are able to speak Welsh.
Mae canran y boblogaeth a anwyd yng Nghymru sy'n gallu siarad Cymraeg tua theirgwaith yn fwy na'r ganran o'r boblogaeth a anwyd y tu allan i Gymru sy'n gallu siarad Cymraeg.