The questions and answers can individually be set in the desired language. You can adjust the error messages of the form by clicking on the key icon on top of the editor.
The pop-up displays the error messages. These can be adjusted to your own wishes. Furthermore, you have a validation for each question which can be adjusted to another language. Double click on a question and go to the tab Settings. We advise you to only do this with mandatory questions. Only with these questions, a validation takes place and if necessary a notification will be shown.