multilang autotag custom function is available for download by hiroron.
http://hiroron.com/downloads/index.php/custom_multilangstory
multi language story link autotag for storytext.thtml and article.thtml
example:
http://www.yokosojapan.net/article.php/20140120meiwa-shiomi_international_ja
English and Korean and Chinese link bellow.
_ja, _en, _ko and _ch story there.
http://www.yokosojapan.net/article.php/20130406red-white_event_ja
Only English link bellow.
_ja and _en story there.