How can I change the Submit button text in Google Forms?

You cannot change the button text directly in Google Forms, but you can use the Formfacade add-on to change the submit button text. You can also customize the button color, style, language & more.

How to the change the default “Submit” button text?

Pre-requisite: You must have installed the Formfacade add-on for Google Forms. If you haven't installed the add-on yet, you can install it from G Suite marketplace using this link.