Hmmm? I think she's just weird?
Maybe Square did it to make her words more enthersized her words so when she says "Kurse you SeeDs" she might be saying "Curse you SeeDs" with an Enthisis on the "C" to make it more dramatic? Hope that helps!
(Note: Don't cry! I think youreright or at least that's how I've always spelt it!)
