On 27 January, the Annual Population Survey (APS) results on the Welsh language for the year from October 2020 to September 2021 were published.
Ar 27 Ionawr, cyhoeddwyd canlyniadau'r Arolwg Blynyddol o'r Boblogaeth am y Gymraeg ar gyfer y flwyddyn o Hydref 2020 i Fedi 2021.