Change Check Out Custom Form Button Text

I'm looking for CSS code to change my check out custom form button text. Currently is says "purchase", I'd like it to say "submit".

Here is some code I'm using to change the button background color and text color that is working... now, I need to change the button text.

.form-wrapper input[type="submit"] {
 display: block;
 background: #3d6a66 !important;
 color: #dcdcdd !important;
}

Thank you!

Mark

You mean Purchase button on Product or? Or can you share link to page where you have problem? We can help easier