I've been working on a project to translate a few DVDs that only have non-English subs/audio. My language skills are not up to much (damned British education system), but thanks to some online translators, my job mostly consists of putting the words into an order that makes sense.
Obviously when complete, I'll post the files to my website - attaching them to the DVD isn't too hard, you'll need to rip the disc, add the subs with a helpful freeware programme, then burn a new DVD-R, but at least its all legit!