>>56295661She could still be from Kalos. In the Japanese version she speaks with an American accent but that doesn't mean that she has to be from Unova. There are serval characters from Kalos like Clemont, Korrina, Grant, and Viola who aren't written with specifically French dialects at all. Fantina could still speak with an American dialect and be from Kalos.
I think that her outfit being a French ball gown tells us more about where she's from than her accent.
