Smaller changes of between -3.0 to 2.0 percentage points were seen in the percentage of adults aged 16 to 64 who were able to speak Welsh across local authorities between 2011 and 2021.
Gwelwyd newidiadau llai o -3.0 i 2.0 pwynt canran yn y ganran o oedolion 16 i 64 a oedd yn gallu siarad Cymraeg ar draws awdurdodau lleol rhwng 2011 a 2021.