Paid in full message

Can I amend this message to read Paid in Full/Pagado
If so how do I do it?

You will need a custom theme. This Guide will show you the code involved: https://www.manager.io/guides/22026. You will need to redefine the emphasis.text variable, but that is beyond the scope of this forum. If you do not have the Liquid programming skills to accomplish this yourself, hire a local programmer.