yes, I've tried that but it didnt work.
in the normal wikipedia there is this column at the left side of the screen and within it there is a dropdown menu that says "languages".
so when I add [[en:Stranded II]] to the german S2 article this doesnt work, it's just a link that is shown at the place of normal text in the article and it leads to the page "en:Stranded II" in the german wiki which of course doesnt exist while the page "Stranded II" exists in the english wiki.
I dont know whether I'm explaining it wrong or too difficult but from my point of view this problem is pretty easy to understand.
also I think that this problem is due to some options which DC has to alter so the [[en:Stranded II]] isnt shown in the text but in the sidebar and it doesnt lead to a page in the german wiki but to a page in the english wiki.