The issue over the subtitles not being hard coded into the picture is unfortunate. Of course, Star Wars is not the only example where this has been done (off the top of my head, the Kill Bill DVDs do this as well and there was a whole issue regarding the Bond DVDs). If the issue over language is a problem, just look at DVDs that do include hard coded subtitles. The Lord of the Rings films, for example. The other language subtitles are placed on screen elsewhere. Of course, this ends up looking rather cluttered with all the text onscreen, but it's a tradeoff. Of course, they could've gone with multiple angles, since this is already done with the opening crawls anyway.