WPML issue / your tutorial correct?

I would like to add (beside German) a second language (English) with the help of the plugin WPML. I watched your tutorial https://vibethemes.com/documentation/wplms/knowledge-base/wplms-with-wpml-multilingual-plugin/ but I guess there is something missing wrong in this tutorial or I need your advice. At 1.58 min you switch from the main language to the added language and there you enter the translated websites in the tab "pages" of buddypress and save it. You explain something similar at 5:50 min. for the WPLMS pages in the course manager. BUT, if you add the pages in these pages and you save it and you switch back to the original (main) language all entries are deleted and vice versa. I was talking with WPML about this for Buddypress Multilingual and they told me that you only have to enter the pages in the original language and leave the entries of the translated language as they are (means empty, not connected). It will work anyways. Now I am confused. Does it work like they say or do you have different experiences? To put it into a nutshell: do you see with the main language the entries of the entered and saved pages and if you switch to the new language you see the translated pages and both don't delete what I have saved before in the other language? Thank you very much in advance.