Idea: setting preference for documents in original language
mv blowin-in-the-wind.en.html blowin-in-the-wind.en-x-orig.html
mv osterspaziergang.de.html osterspaziergang.de-x-orig.html
AddLanguage de .de
AddLanguage de .de-x-orig
AddLanguage de-x-orig .de-x-orig
AddLanguage en .en
AddLanguage en .en-x-orig
AddLanguage en-x-orig .en-x-orig
Options +MultiViews
With Accept-Language header en,de
both documents appear in English, with de,en
both documents appear in German.
With Accept-Language header en-x-orig,de-x-orig,en,de
both documents appear in their original languages.