After reading that the actress who plays Kylie (Leisa Gwenllian) also plays Bethany Summer on Rocket's Island, an English-speaking show, I had wondered about her Welsh - in the couple of episodes I had seen so far, she had never said a whole lot.
Today I found two videos which I think are of her, from last Christmas, reciting two poems:
a comical one about her mother's diet, and
an adaptation of "A Magical Night before Christmas".
She has the lovely north Wales "u" sound (e.g. in "tŷ" or "cau")
Perhaps those of you with more Welsh will enjoy listening to them!