WC Cart All in One plugin can I change the language? Is not working well

Hello,

I´ve just found this Plugin and I´m really interested in buying the Pro Version.
But first I wanted to know if I´m going to be able to change the language in some buttons (Update cart, the notification when you add a product to the cart). I need them in spanish.

Also, I wanted to know if the Pro version includes the personalization of the variable products pop up. This is practically why I wanted to buy this plugin.

And the last thing: I activated the free version and when I wanted to add variable products by the product page. The pop up doesn´t appear correctly on the computer. On the computer doesn´t appear the Add to cart button so I cannot add the products at all. The pop up is at the bottom page so it´s not appearing well. I don´t know if you can fix that.

I hope you can answer all my questions.

I will wait for your prompt answer.