Dieter Maurer wrote,
The "absolute" in "absolute_url" indicates, that the URL is independent of the access context, based solely on its physical location.
This is almost correct; you can use Access Rules to change the virtual root [Philipp: put an access rule in the 'german' folder, and in the access rule, do something like REQUEST.setVirtualRoot('http://server/german')], and then the absolute_url is relative to this root.
If you need the breakcrumbs only in a kind of management interface (what I expect), you can use "URLPATH1" (maybe URLPATH0) as starting point, as in this case the object's URL is strongly related to the request URL.
I don't know anything about breakcrumbs or breadcrumbs, but I think investing a little in access rules will make your life easier along the way -- your dtml will look much more natural. Hope this helps, Shai.