Have a multilingual page and, as in the totorial, using the first level of pages as a holder for each language. With different configured instances of show_menu you can schange language on one menu and navigate from another. As the first page is the one you see when enter the site it has to be a menu link and not a ordinary page with content. 
My probelm is now the a menu link doesnt work, wb says (genereted by wb) "enter the mainpage here" (or something like that) in the content area with a link to / (again). A menu link simply doesnt work as a first page.
my menu link is configured /pages/home
File structure:
The URL shows www.site.se/
When it shuld have shown www.site.se/pages/home.php
A workaround for this was to use an intropage and put in a php redirect.