I have the same kind of problem, but with Silver Chaos 2. The dialogues are translated but wow, it's a complete mess. I mean, sometimes I can grab the meaning of the sentence by changing the order of the words, but some other times it has absolutely no sense.
I tried to do change the text speed, as suggested, but when I go to the game menu....I'm completly lost, since AGTH doesn't translate the different options. So it's impossible for me to change the speed.
So I was wondering, maybe someone already knows how to change the text speed in this particular game (Silver Chaos 2) and can tell me how to do it, or maybe there is a way to make AGTH translate the menu ?
Because, I must tell you, I tried to use JWPce, and rewrite the options kanji after kanji (since I can't just copy-paste it), but it' an impossible task : first, finding the right kanji is like looking for a needle in a haystack, and second, when I manage to find the kanjis AGTH doesn't translate it right so it doesn't have much more meaning than if let in japanese...
Please, help me