Automatically separate the user comments by the language they viewed the article in.
Tested with WordPress 3.9 and everything works fine. Note that the current version of qTranslate(2.5.39) however breaks my test site with a fatal error.
Changed the tested up to version to 3.5.1. Changed stable tag from trunk to tag number.
Changed the passing of the comment language to a much, much more simple way, that should be more proof to errors.
Fixed a bug related to proper setting of the language/redirecting back. The code was tested both from a root-level install and a sub-directory install.
fix_comments_count()function(a typo was returning the wrong comments count) - thanks @hyOzd