analysing a range of data sources to try to better understand the differences we are seeing in the numbers who identify as being able to speak Welsh
dadansoddi ystod o ffynonellau data er mwyn ceisio deall yn well beth sydd wrth wraidd y gwahaniaethau o ran y niferoedd sy’n nodi eu bod yn medru’r Gymraeg rhwng gwahanol ffynonellau