If you submit the donation form, and then toggle the language (using the S73 s-tag), it grabs the current URL and appends the language preference. But when your form has errors, the full/correct URL is lost. The URL in the address bar is "https://[[DOMAIN]]/site/Donation2" and navigates the user away from the donation form that they were on. We could create one pagewrapper per donation form, but we prefer not to since our organization creates many donations campaigns throughout the year.