I am inclined to agree with everyone about SE not bothering to fund the dub in other countries due to fearing a loss of money. But, wouldn't boycotting it, like you seem to be dead set on doing now, only do the opposite of what you want? I mean I have never boycotted anything before, but I don't know, you seem to think not buying the game will change their mind about translating it when people not buying the game are the reason they aren't translating it in the first place... So it would be counter-productive? Maybe? (If I am way off base here, I apologize)
I would be more inclined to agree with what Spock said and to try and show Square that you all do car, and that you do want this in your language. And if that doesn't work, then an online guide made by fans is a decent alternative. I am not fluent in Japanese, just as you are not fluent in English, yet I know enough to get me through the basics and I have enjoyed many Japanese games. I mean that is just my two cents...
The problem is not even a dub, except KH 1 and KH 2 no KH game was ever
dubbed in european native Languages around here, the handheld titles always had only the English voices.
The problem here is that they won't even translate the subtitles or menus in those languages, screwing over those Italians and Spaniards who are not fluent in English.
If I saw it correctly there is already a petition running, alongside with one asking to give EU at least
something for the 10th Anniversary as well.
On the topic of Dissidia Duodecim, that one Square even botched a bit here in Germany. They translated the dialogue subtitles into German, but beside the voices (which again, is normal in Europe for handheld titles) all menus, item and attack names remained in English, lol, very consistent.
I also agree with Spockanort though on the premise that it is mostly for business reasons.
The kicker to all this? They originally had the website in Spanish and Italian and according to some commenters they apparently took down these versions and only kept the French, German and English versions.