I've been searching for this, but I haven't been able to find a solution.
When you use a Wizard container, you can change the text in the General options. So far, so good.
But when you submit the form, the "Finish Text" changes to "Submitting..." and when we hide the form after submission, a button appears that says "Return to the form". I can't seem to figure out how to change the text on either one.