I just watched a VHS rip found on the Mule, and i can assure that even if it's in french you don't really need subtitles. There's only a few dialogue scenes, the rest of the movie is more about groaning, moaning, screaming, blood barfing and some ambient sounds. I'm not sure it's worth a proper post (i'd still have to offer english subtitles for that).
So, if you're interested:
ed2k:
Devil%20story%20-%20VHSrip%20fr%20nanar.avi [637.60 Mb] [
Stats]
EDIT: I forgot "cheesy synthesizer wannabe creepy music".