Okay so not so simple to do anyway.

I guess Allan's suggestion is the way to try then.

"Is it that you want to only show the documents in Danish on your "view"?"

Well, actually that is exactly what I don't want. I need to file documents a videos from many different countries. But many of my visitors (apart from the native English speakers of course) will be able to use both English and entries in their native tongue.

It can be a bit refusing though to see many different languages in the same view though, so it would be a nice feature to be able to browse by language and even better to for instance browse by author and then sort by language.

These guys have been able to figure out how to browse by document language:
http://orgprints.org/view/doclang/

I guess they implemented the hack, I referred to earlier, which can be found here:
http://osdir.com/ml/web.eprints.devel/2003-03/msg00053.html

Thanks for the feedback gentlemen.