CvS2 - Lost in Translation

[Juan]

Here's something I think it's strange:
Looking into the files in Capcom vs. SNK 2, I've seen a couple of files that contained the demo text and the winning frases (MESJ_DM.BIN and MESJ_WIN.BIN).
The thing is that there are also 2 files called MESE_DM.BIN and MESE_WIN.BIN; so I check them out and they contained some of the dialogs translated.
Anyway, I replaced the Japanese files for this English "translations" and I got the game to work with english text, but sometimes when playing in non single modes the text got screwed up and even frozen the game. So, if you want to see
the messages in English or if you want to translate the game this files are useful I think.
I guess if you just replace the MESJ_DM.BIN the game won't hang, because playing in single mode I could see the endings translated without problems.
I wonder: Why are the english files there? Are they used in the game?
This happens in more Capcom's Japanese games, but I only care for CvS2 since there's no US/Euro version.