A decrease of one percentage point in the percentage of the population aged three or older who can speak Welsh fluently in 2019-20, from 11% to 10%.
Gostyngiad o un pwynt canran yng nghanran y boblogaeth tair oed neu hŷn sy’n gallu siarad Cymraeg yn rhugl yn 2019-20, o 11% i 10%.