In fact, it works like this. I thought so, too.
However, it is then no real German. It looks strange and wrong.
With "overide" deactivated, the filter tags with umlauts work immediately.
I had previously removed the umlaut in alias (alias = kultur-fuer-senioren)
It seems that Zentools2 (Vers. 2.4.2) has problems (bug) with umlauts in the "overide filter option".
Joomlabamboo had solved the problem before? How could it turn up now?
Will give it a bugfix in the upcoming Zentools2 version. Is this communicated with the developers?
Especially since the problem does not seem to exist in zentools2 (version2.4.1).
As I described above, in the first post.
I'm just gonna temporarily rename the tag...and wait and see
;-) t.b.c.,...Cheers Frank