"Yes she wants chocolate, yes"? Is this a typo or does "ydy" frame the sentence like the spanish ¿
No, Here you have a question (Ydy hi eisiau siocled?) and then the expected answer for the person (Ydy.), this will have been done since the word for yes changes depending on the person.
ydy is not only an answer to a question ("Yes, he/she does.") but also the form used when asking a question ("Does he/she ...?").