A question about comments_number() in loop-*.php

I used POEDIT to translate the Frontier theme in French and everything is ok. But I still have two texts that was not localized : the comments part in the main page (posts list) and when viewing a post. I found the corresponding lines in loop-blog.php and loop-single.php and changed “<?php comments_number( ‘Comments’, ‘1 Comment’, ‘% Comments’ ); ?>” to “<?php comments_number(); ?>”. This way, I get the translated text from WordPress core. Is there any reason you forced code the english text in comments_number() function so my change can have a misbehavior that I don’t see.
BTW, thanks for this great theme. It’s the first time that I adopt one as quicky after previewed it.