Don't underestimate the size of this eboot translation (menus, status text, explanations, character names, chapter names etc.). Side by side comparison is too tedious and I'm sure you won't find all text passages in the game. By the way you need a modified PS3, a normal PS3 with the latest firmware, a original copy of the game, a jap. post-game save, an eng. post-game save game and a lot of time. Who has such requirements?
And you need 2 screens to display the stuff