On 31 March, the Annual Population Survey (APS) results on the Welsh language for the year to December 2021 were published.
Ar 31 Mawrth, cyhoeddwyd canlyniadau'r Arolwg Blynyddol o'r Boblogaeth ar y Gymraeg ar gyfer y flwyddyn hyd at fis Rhagfyr 2021.