In the editor, you have the option of choosing one of four languages for form validation messages. They appear when the user incorrectly completes the form on your landing page.
Language of messages to choose from:
You can translate messages to another language using an additional script – here you will find instructions on how to do it.
1. Go to editing the selected landing page and navigate to Page Settings (menu on the right) > Additional Options > Other. Find Form validation messages language, click on the drop-down menu and choose the language (1). Click Save and Close (2).
2. Publish your landing page.
Validation messages on your landing page should display in the chosen language.
Note: the language of the form validation messages also affects the language of the date/calendar in the form if it has this field.