someone find "Bridges in Athens" if the category title was
in Greek? Or "Palaces in Istambul"? Or "Rivers in India" (and what
should we use in this last case?).
Categories redirect works quite well, so this argument is not valid.
See for example http://commons.wikimedia.org/wiki/Category:Monte_Bianco
Yes, you can redirect people. But you can't redirect images. Hence people
will not find images that are not in the "deutsch name" gallery.
Furthermore, I object that this is made some kind of political/ideological
issue. I speak a language that is not in the top 100 of most spoken
languages in the world, which is not the case for most of you. I've also
studied 14 foreign languages (no, I don't know most of them). Neither of
these nor both of them combined stops me from seeing that the lingua
franca (sic!) is English and using the most common language is the only