When you click on Add Language, you are asked to select the new language that you’ll be adding. Then, you will need to press the Customize button that appears on mouse hover.
Note: Messages and fields can be translated from the Basic plan, but if you want to add multiple languages to the form, you’ll need to upgrade to a paid plan.
From there, you’ll be taken to the customization lightbox pictured below, where translations are created. On the left side, there are listed all the form fields that you’ve created and all the messages that form users may see while filling out and sending the form. Add the translations in the text boxes on the right side. Press Save when you’re done.
Note: You can only translate Form Fields, Form Fields Instructions, Email Notification Messages, System Messages and Payment Messages. In other words, only fields and messages seen by form users can be translated.