When you access the Translations section for the first time, you are invited to select the default language. The words that you used within field labels when building your form in the Form Editor are the starting point for all future translations for a particular form, i.e. they are considered default.
After you’ve selected the default language, two buttons show up: Add Language and Import Languages. The former is used to create the set of translations pertaining to a new language. The latter is useful if you’ve already set up a multi-language form from where you can import translations.
Important: Copy the tags of the messages that appear on the left in case you want to keep the same structure (e.g. %s is used for links).
You can set up certain conditions in Form Rules that will redirect users to a webpage based on the language they have selected on the form.
Don’t forget to tick the option Show multi-language selection on form, otherwise form visitors will not be able to switch between languages on the form.