Social use of the Welsh language by adults (Welsh language use survey, July 2019 to March 2020), file type: ODS, file size: 64 KB
Defnydd cymdeithasol o’r Gymraeg gan oedolion (Arolwg defnydd iaith, Gorffennaf 2019 i Fawrth 2020), math o ffeil: ODS, maint ffeil: 64 KB