I guess he means that if you choose a language you'll get the crawls in that language. This is what they did with the star wars boxset in my country. You select the language at the beginning and the titles are changed into your language accordingly (yet you can still change the audio through the film)
If I may add a thing, if such a thing was possible I guess you'll have to have also Greedo's scene with subtitles different for each language.