It's fully playable, although still missing a couple of extra things like the intro text, chapter titles, etc; hopefully nothing too essential. All of the actual, in-game text seems to be done and working and it seems to be a decent enough translation from what I've played. It should be updated sometime, it was just released this week.Oh wow, I had no idea there was a translation for this game. I might want to look into that.
Here you go: http://www.romhacking.net/translations/2006/