Changing the button content on hover

Hey group!
 

I would like to change my button content when on hover. I know it is possible, but I cant find a proper snippet for it to works on my clients website.

Here is the code I used:

.large-button-shape-rounded .sqs-block-button .sqs-block-button-element--large:hover::before { 
  content: "voir le forfait"!important; 
} 

And here are the buttons I would like to apply the changes:

website: https://alau-site-web.squarespace.com/
password: freelance

Thank you!

You need to make text blue on hover, and position ::before absolutely:

.sqs-block-button .sqs-block-button-element--large:hover {
  color: var(--secondaryButtonBackgroundColor);
}

.sqs-block-button .sqs-block-button-element--large:hover::before { 
  content: "voir le forfait"!important; 
    color: white;
  position: absolute; 
  top: 50%;
  left: 50%;
  transform: translate3d(-50%, -50%, 0);
}