She must have suspected that it might be a new dreamotion ability she just unlocked or it could be pure luck, but right now, that can be explained fully a little later.

“I have a feeling that it could be a dreamotion ability to me. Back at home, one of my cousins can speak with animals better than I do,” Isa admits to Alastor, “As for the mooncakes part, I still haven’t found out what they are just yet. I will ask the rabbit again.”

“Excuse me, rabbit. What are these mooncakes you are looking for?” she asks the rabbit again, to which it responds through rabbit noises that Isabela manages to relay to Alastor, “I think that it is saying that the mooncakes are round pastries with some sort of filling and salted egg yolks made in honor of the moon.”