Woocommerce problem with language management

I was using wordpress for a very simple webpage with Polylang in order to ofer it in Spanish and English. I use CLEAN RETINA theme (free version) and the simple and free Polylag version.

I have recently added woocommerce in order to have a small online shop. Everything works more or less ok except that some phrases in the SPANISH version of the shop appears in English (for example, when you update the shopping cart it says “Cart updated” instead of “Carrito actualizado) and also some emails are sent with English text althoug you were working with Spanish version of te shop and with a Spanish language defined browser (for example, the “Welcome email sent to new registered users” is in English instead of Spanish).

Once I deactivate Polylang plugin…then everything works fine and all messages and emails are in Spanish.