I understand, that language of the form will be set accordingly to the language of the website. I change this to German and all error messages (and the backend and all) went German. But the Buttons are still in English (Next; Previous). What am I doing wrong?
The strings are saved to the form or field settings, so translations are only applied when the form is first created or when you add a new field to the form. You’ll need to edit the button text settings on the page and submit button fields in the form editor.
Thanks, but … all of them?
Yes, the strings are saved in the settings, so you’ll need to manually update those settings.
Not so great, but thanks though!