You'll need to create a custom workflow.
Another option would be just not to create the special characters to begin with. You can add validation to your form to prevent people from adding those characters.
Yet another option would be to encode the characters when the form is submitted. qRules Encode command could be used. You'd have to inject your form with qRules (easy) but it's a third party tool and while there is a free trial available, there is a small amount of money involved to purchase a license.