Editing the "Form submitted successfully" message
The "Form submitted successfully" message that appears after a form is submitted can't be edited directly.
However, you can set up a thank-you page to hide this default message and show your own custom message instead.
Set up a thank-you page to display a custom message
A thank-you page is a page that appears after a form has been submitted. Once it's set up, visitors are automatically taken to that page when they submit the form. This replaces the default "Form submitted successfully" message with any message you choose.
For detailed setup instructions, see Thank-you page.