Now that I've played it a bit, I have a few questions:
1. CS patched with your translation makes Mezz invulnerable to damage for some reason. I've checked and it doesn't happen with the original (IE it's not a bug original to the game.) Were you using a Godmode plugin that you forgot to take out? Leaving out the js folder from your patch and just using the originals doesn't fix it though, so it seems like you may have messed up something with the enemies skills/attacks while editing.
2. Is there any reason you're redistributing the js/plugins folder in the patch? As far as I know everything that needs to be translated should be in data.