"Yes, I want to learn Welsh."
Translation:Ydw, dw i eisiau dysgu Cymraeg.
I don't know if they're allowing "moyn" yet as a correct answer. The Welsh team said they were looking into adding dialects (i.e. "dach chi" AND "dych chi"), but I don't think they have yet. But yes, that would be correct; "Dwi'n moyn dysgu cymraeg."