WPML seems to insert wrong terminology into a field in the backend. I do not insert anything manually and have adjusted it a couple of time, but it always comes back. I cannot reproduce it or give any guidance on it, I just suddently after some time see that it has been adjusted again. Maybe the translation database has a translation, it inserts it automatically, causing a German term to be shown on an English page.
Thanks for contacting WPML forums support. I'll be glad to help you today.
Could you please use the following steps to search for this string?
1- Go to WPML-> Theme and plugins localization, select your theme/plugin, and scan
2- Go to WPML-> String Translation
3- Scroll down and click on the "Translate texts in admin screens »" link
4- Search for the needed strings
5- Select the strings
6- Click on the "Add to String Translation" button
7- Then click on "the « Return to String Translation" link
8- Translate the strings, clear the cache, and check the front end
