I have an e-commerce developed with the CMS Prestashop.
Yesterday i have seen in my Webmaster Tools that i had some duplicated URL, like this:
www.mysite.com/manufacturers
www.mysite.com/it/manufacturers.
Where 'it' is the suffix of the default and only language for the website.
I've already activate the friendly URL in the back-office and also I've a .htaccess file generated automatically by the generator in the back-office.
What should I do to fix this issue?
PS: Also I think that I've already taken a penalization from googlebot.