WordPress.org

See Official FAQ

I would like to have separated comments for each language.

In order to have comments tracked separatly for each language, you will have to change your comments.php template file like this: From this:

action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php"

to this:

action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php?lang=<?php echo zd_multilang_get_locale(); ?>"