On 5 October, the Annual Population Survey (APS) results on the Welsh language for the year from July 2020 to June 2021 were published.
Ar 5 Hydref, cyhoeddwyd canlyniadau'r Arolwg Blynyddol o'r Boblogaeth am y Gymraeg ar gyfer y flwyddyn rhwng mis Gorffennaf 2020 a mis Mehefin 2021.