Thank you for contacting WPML Support. I took a look at our issue tracker and noticed it is a reported bug escalated to our compatibility team with a 'working in progress' status. For now I recommend you to translate your form using the 'WPML Classic Translation' editor, you can change to it from your WordPress Dashboard > WPML > Settings > How to translate posts and pages. I've just added your ticket to our list of reported bug as well, so the fix could be done soon. Thank you for your understanding and patience, have a nice day.
Hello,
I globaly use: WPML's Advanced Translation Editor.
If i set it to Classis, your site says:
For content already translated using the Classic Translation Editor, you should keep using that editor. Switching to Advanced Translation Editor would mean translating that content all over again. Similarly, you cannot use the Advanced Translation Editor to edit translations done by a Translation Service. You can only edit those translations using the Classic Translation Editor.
Thank you for the updates. In this case, my recommendation was to temporary use the Classic Translation Editor for the form translation only, this way when done you can change back to the Advanced Translation Editor.
You shouldn't edit the other translations using two kind of editors in order to avoid loosing your already made translations. Please, let me know if it works for you, have a nice day.
So I found were the problem comes from.
The email form is from Contact 7, the recaptcha 3 from Google and the Cookie warning form the plugin: Complianz
So I went to my contact 7 form and clickt on the pencil next to German language and went to some other product page. So that was not good.
So I did set the form to Classic Translation Editor.
And I added both .nl and .de to the google recaptcha 3 from Google.
And now it is working!