"Is she a woman?"
Translation:Dynes ydy hi?
That would be fairly clumsy in Welsh, 'ydy'r person yna yn ddynes?
In fact if the conversation is extended, the next two lines could be:-
'Dyn ydy e' (he's a man)
Remember also that the third person pronoun is also 'it' so another interpretation of this conversation would be
"What's the name of your friend?
Woman is it?
Man it is."
Mae hi = is usually a statement 'she is' eg 'Mae hi'n nofio' = she is swimming (she swims)
Ydy hi = is usually a question 'is she' eg Ydy hi'n hofio? = Is she swimming? (does she swim?)
'Yw' is an equivalent to 'Ydy' heard in South Wales but it's not used at the beginning of a sentence.
Often used in emphatic sentences eg:- Sioned ydy hi/Sioned yw hi = she is Sioned (lit Sioned is she)
Nevertheless; it should not mark me wrong for beginning with "Ai" because that is the correct way to ask this kind of question. "Ai...?" turns an assertion "Dynes ydy hi." into a question, "Ai dynes ydy h?" therefore it should be taught here on Duolingo, and not marked wrong. Turning an assertion into a question just by changing the tone of voice is not as common in Welsh as it is in say, French or Spanish, and the word "Ai" would normally be added at the beginning.