Random Chaos

Even Kain's not immune to mondegreens. I can think of a few people who heard "FLESH OF THE COVENANT!" which took my brain in places it really should not have gone but. I HAVE NO REGRETS. Considering that there are things that just don't translate, it's not surprising. But I will concur--Kain is magnificently done.

…even THAT sounded wrong. Anyway. The main reason for the difference is because they had to improvise, having lost touch with Gabranth's original VA. But, when you stop and think about it, there are some reasons why the accent slippage works in theory.

Now on to my theories. Minor spoilers for FFXII
Keep in mind that this is wild guessing on my part, but not quite of the Epileptic Trees variety:

1) [The more logical theory] Gabranth is not a native of Archadia (established fact). He joined them after his homeland was wrecked by the armies and Basch had already cut and run, joining the rebellion. Note that Basch doesn't speak with the accent. Conclusion: He adopted the accent as a way of blending in with the Archadians. (I haven't gotten super-far in game, but on one occasion, when Basch manages to push the right buttons, he drops it. I don't know if it happens again because I NEED TO GET THE PS2 BACK DANG IT)

2) [The slightly more Epileptic Trees theory that's been bouncing around on TV Tropes] This isn't Gabby. Vaan's reaction to seeing Gabranth, pre-battle, is quite similar to when he sees Basch in that torture-cage-thingy. Gabranth's reciprocal quote to Vaan seems to mirror the reaction that Basch has on finding out that Reks was Vaan's brother. CONCLUSION: As far as Vaan knows, BASCH LIVES and therefore he is pissed.

3) [Wild mass guessing, contains spoilers] Dissidia wreaks havoc with the timeline of most of the series. There's some evidence that the worlds of II and IV are the same, separated by about a hundred years (see the story of Cecil's Deathbringer, left by a Dark Knight named variously in translations as Leon, Leonhart, and Renault in one amusing mistranslation; in-game canon makes Leon the first Dark Knight in the series). At the end of XII, Basch takes over Gabranth's position, going as far as taking on his identity to keep certain events quiet. CONCLUSION: This is Basch, not Gabranth, thanks to the timescrew, and thanks to the effect of memory wipes, no one has any idea.

There's holes aplenty in all three of these, especially the second two. Logically, the first one is the more likely of the two.

Of course, this is all theory. One piece of Fridge Logic thanks to the first one, but theory.