My update in the other thread:
Sorry for the delayed confirmation, but yes, the PS3 version game will be region-locked. I certainly can't offer details as to why, but there might be an official response at some point.
To reiterate, our version of the game works for the North and South America regions. Also keep in mind that both the NA and JP versions have both English and Japanese text/voice options, making them nearly identical. I'm unsure of what the case will be for the EU version.