Just found out that the translated pages are still there and not gone, but they did not transfer automatic with the main posts. They needed to be transfered too and then to be connected by clicking on the link “Connect with translation” at language frame on the right side.
This helped also to solve the topic … https://wpml.org/forums/topic/move-posts-and-their-translations-from-posts-category-to-a-custom-post-type/
https://wpml.org/forums/topic/migrate-post-to-new-costum-post-type-does-not-work-for-translations/
https://wpml.org/forums/topic/changing-post-types-but-preserve-translations/
Thank you so much for the fantastic support!!!
