add to cart & success message

Hello, thank you for your plug-in.
I’m trying to setting up a site and everything is running fine (wordpress 3.8.1 woocommerce 2.1.6) the only problem I’ve found is when I add to cart a product from the general product list by pressing the button the message in the cart page (success.php) doesn’t appear in the language in use, however, if I add the product from the single product page everything it’s ok.
Can anyone solve the mystery?

https://www.ads-software.com/plugins/qtranslate-support-for-woocommerce/