Until now, you had to create separate forms – one for each language. Now, with the addition of Contact Form 7 Multilingual, you can create one form and use it for all your site’s languages. You will insert the same form into pages in different languages and WPML will allow you to translate the texts that appear in the form.
Whether you are using the Advanced Translation editor of the Classic Translation Editor, you will be able to translate the form template, notification messages that are displayed to the user on the front-end, and the notification email texts.