By contrast, among the Welsh-speaking population aged 65 years or older in work, 61% speak Welsh with colleagues at least some of the time and 32% use Welsh all of the time.
Dywedodd dros hanner y siaradwyr Cymraeg 16 oed neu hŷn mewn gwaith eu bod yn siarad Cymraeg â’u cydweithwyr o leiaf rhywfaint o’r amser.