2
A danish user found the solution, and I belive that it is not a danish problem, but a problem i all language.
In the file language/xxxxxx/main.php
Line 5 is
include_once(XOOPS_ROOT_PATH."/modules/wsproject/language/english/shared.php");
The line has to be changed to
(XOOPS_ROOT_PATH."/modules/wsproject/language/".$xoopsConfig['language']."/shared.php");