The only one I know of is a very partial patch found here: http://www.ulmf.org/bbs/showthread.php?s=a5a5dfc6dac5333e94ccc52d73a8999e&t=2359&page=11
I don't think there's any dialogue translated, only skills, items and the likes so you'll at least know what you're doing (more or less...). I'd love to see an actual full translation myself, but so far I haven't found one.