Problem translating Menu Cart

I need the Buttoms of the Menu Cart (Show Cart and Checkout) in Spanish when I click the car in the navigation bar it appears in the right side like a window with these information.

As I found in the support topic of your page and in the https://docs.woocommerce.com/document/woocommerce-localization/ It is recommended to use the plugin Say What? However, it did no work

I am using as follows

Original String Show Cart
Text domain woocommerce
Replacement String Ver carrito

Original String Checkout
Text domain woocommerce
Replacement String Finalizar compra

Do I have a problem with the domain or there is another way to do that?

Thanks for your help

Maria Andrea