I never played V, so hell if I know.
One thing I wish they'd stop doing is referencing Terran culture when the planet is clearly not Earth. There is precisely ONE instance of that that I'll let slide, and that was Tidus' Macarena crack in FFX; that made me laugh so hard I almost wet myself. They're very careful not to do that in science fiction that doesn't involve Earth; Battlestar Galactica, for example, has few references to the culture of Earth, simply because that's the planet they're trying to find. Star Wars has basically no references at all to anything that originated here, except stuff that's deliberately placed in as an easter egg.
All the crests and sigils in X were named after the other planets in our solar system. Why is that, exactly, if it's supposed to be a different planet? That really grinds my gears. In IV, FuSoYa refers to the planet they're on as Earth, and postulates that the moon is a recent creation. Analysis of material from the moon shows us otherwise. Postulating that the aliens messed with it is like saying the Flying Spaghetti Monster is screwing around with math. I personally hold that VII takes place here, far in the future, or at least in some kind of alternate history that is also physically here.