First of all, let me say that this is an awesome project I have been looking forward to ever since I first played Romancing Saga 3 in Spanish! Unfortunately though, I stumbled upon some bugs (I know it's not finished, so it's best to report them now, I guess). If you're already aware of them, even better.
1) I don't remember the name of the town, unfortunately. But it was in Gray's scenario, relatively early on. In the upper right corner of the town, there were two sailors that offered to transport you to two other towns. When you refused their offer, the screen became pinkishly garbled and apparently showed broken tiles. I couldn't solve the problem, neither by opening the menu and leaving, nor by entering and exiting a house, so I assume it'd be impossible to fix once it happened.
2) This is a two in one problem. In Gray's scenario, you have a mage named Myriam with you. I tried to teach her Light magic as soon as possible, so I went to a magic shop and bought Starlight, I believe it was. When I then entered combat however, I couldn't select light magic. It was as if I hite the B button and reseted a selected action for her. In the menu I realized that she indeed had a list for Light magic, but it was empty. The spell didn't show up. I then went to the same magic shop to buy the spell again, but the merchant told me "You already know this spell!", so I couldn't fix it. I didn't yet try if it changes when I learn another spell of the same type. The same happens with Arcance magic, too, by the way. With Energy Bolt in that case.
Anyway, keep up the awesome work, apart from these few flaws, I think it's already very well playable!