Add to cart button text for free products

Can this plugin let you change the add to cart button text if the price is free, whether it’s free because it’s on sale or whether it’s free because of a group the customer is in or because of a coupon the user has.

Basically, no matter the reason a product is free for a customer, can we make the text of the add to cart button change if it’s free?

Thanks,
Rob

https://www.ads-software.com/plugins/woocommerce-poor-guys-swiss-knife/