Don’t most Blu-ray players have a zoom setting for non anamorphic DVD’s? I know Panasonic does.
But then you’ve got the problem of the alien language subtitles getting cut off. Unless of course the player doing the zooming also automatically repositions the subtitles, which I suppose is possible. I’ve got a panasonic bd player so maybe I’ll test it out on a 4:3 dvd.
If it’s on a player rather than a TV it might move the subtitles for you. At least, that’s what the Xbox 360 does.