The "%1$s" and "%2$s" syntax needs to be applied in the Korean and Japanese language files, isn't? So i think you can already apply this placeholders in the required translations. The other files use default argument order so don't needs more specific placeholders [1].
[1]
http://php.net/manual/en/function.sprintf.php
To demonstrate it i try to apply it via
http://translate.dokuwiki.org/dokuwiki
Submitted at
https://github.com/splitbrain/dokuwiki/pull/343/files
Can you update the other cases?