Thank you for hint, but I couldn't solve it.
I removed line 40:
<span class="nb-comments"><span itemprop="reviewCount">{$nbComments}</span> {l s='Review(s)' mod='productcomments'}</span>
Changed the translation in part of: {l s='Review(s)' mod='productcomments'}
Cleared cache of my browser and PS BO - still no effect.
On all 6 languages of my site, Review(s) is still not translated and in English.
Like seen here: http://snag.gy/B6rc6.jpg
Selmankara, could you say in few words what exactly you did with this tpl file?
Thank you!