On 31 March, the Annual Population Survey (APS) results on the Welsh language for the year from January 2020 to December 2020 were published.
Ar 31 Mawrth, cyhoeddwyd canlyniadau'r Gymraeg o'r Arolwg Blynyddol o'r Boblogaeth ar gyfer y flwyddyn o fis Hydref 2020 i fis Medi 2020.