You can change the labels of the various elements in the Copy and Pay widget.

You should be able to do this with the Copy and Pay API:

We have a label function that will let you swap the labels for the various elements. The complete list of available labels is here:

You can include the following code snippet above the <form> tag where you are embedding the widget:

<script type="text/javascript">
var wpwlOptions = {
labels: {cardHolder: "Name on card", cvv: "Security code", submit: "Register"},
brandDetection: "true"