I guess Siebrand will be able to tell. Let's wait for his answer.
Kiwix will not if Kiwix doesn't have the code to fall back to other languages than English.
Oh, that's pretty cool. Do you have a reference to the fallback behaviour you can share?
The best I can share with you is: https://developer.mozilla.org/En/How_to_enable_locale_switching_in_a_XULRunner_application
... but this still does not answer exactly to your question. The best choice is: you check it out (by testing) yourself. If something goes wrong, please open a bug report at http://reportabug.kiwix.org Kelson (talk) 18:57, 27 December 2011 (UTC)