Change "Free" product-price to a different content

Site URL: https://goldfish-dandelion-wx5k.squarespace.com/

Hi,

https://goldfish-dandelion-wx5k.squarespace.com/

password: password

Is it possible to change the naming of the product-price "Free" for only one specific block or only for the prices where they're free to a different one (I'd like to change it to my local language)? 

I tried to change it within Custom CSS using code: 

.product-price {
  visibility: hidden;
  position: relative;
}

.product-price:after {
    visibility: visible;
       position: absolute;
    top: 0;
    left: 0;
    content: "Bez maksas";
}

But it did change the naming for all the prices.

The area where I'd like to change the price name is block-397abe17e25ec7d85e1e 

Thanks in Advance!

Patricija

Can you share link to shop page & Which product you want to change?