"Dw i eisiau dysgu Cymraeg."

Translation: I want to learn Welsh.

[Geoffdwi]

Is it ok to mutate Cymraeg to Gymraeg after dysgu?

[ibisc]

No, there is no reason for it to take a mutation here.

[Euanjoc8]

I'm confused about the verb 'to be' in Welsh. I looked it up and found this website https://www.cs.cf.ac.uk/fun/welsh/Lesson02.html. It says 'I am' is rydw and 'you are' is rwyt. But this has 'dw' without the 'ry'- could someone explain this to me please?

[MarkBennett6]

There is more than one form. "I am" could be "rydw i", "rwy", "dw i", "wi" or even "yr wyf i". Welsh has different levels of formality and a major division between its southern and northern dialects. Don't worry about these variations as a learner. You can just follow whichever form you find in a course and get used to using that one. The variants can come later.

[LunjoRoza]

why are northern variants such as "isio" not acceptable? - could have sworn I'm able to use them elsewhere on the course...

[ibisc]

isio is in several alternative translations here.