You’ve imported HTML for a web form, but when a contact submits special characters available in UTF 8 encoding, they are not being stored correctly in the database. Why?
Make sure your HTML meta tag contains 'http-equiv', 'content' and 'charset' attributes as follows: <meta http-equiv='Content-Type' content='text/html; charset=utf-8'>
Then, republish your web form for any changes to take place. If the issue persists, contact client support.