I went back-and-forth and ended up with just one library and tagging the language and then
defining a user category "languages" with the elements of English, German, ...
Now I have a category language and I just click on any of the elements to select. This is an alternative to saved search. More obvious and easier to handle in my opinion.
Drawback: new languages have to be added to the category definition explicitly. But then again, I do not add languages
that often
.
Cheers, Mixx