Course items are NOT copied…

Hello
I have translated my course in 2 other languages. I thought that the course items would be copied automatically, but nothing is copied – neither my lessons nor assignments from the original course. How do I fix this? I use WPML, and this link did not help at all https://docs.thimpress.com/how-to-use-learnpress-with-wpml-addons/translate-content-on-page-and-course/translate-content-in-course/