"I am a member of the staff."
Translation:Aelod o'r staff dw i.
"aelod o'r gweithlu dw i" If gweithlu and staff mean the same thing, why was my answer wrong?
'Staff' seems to be more commonly used in both languages in the context of 'a member of staff', particularly in the context of school staff.
gweithlu is more an equivalent of 'work-force' or 'labour force'.