"To learn Welsh"
I tried writing dysgu'r Gymraeg , because I remember having read somewhere that the Welsh language can be either Cymraeg or y Gymraeg.
But my answer was not accepted. Am I mistaken?
You are correct, that wasn't in the answer list, it is now. Thanks for the comment.
Welsh is the Anglo/Saxon word for foreigner.
Cymraeg comes from 'Cymru' =land of fellow countrymen, the 'Cymry'
So 'Cymraeg' is 'the language of the 'Cymry'