Not selenak, but, like, when she said that, my mind immediately went to Shakespeare and Marlowe and so on having to (a) write their plays in Latin, which alone (as an English speaker) is kind of freaking me out (to unpack that a little, English can be beautiful and interesting, and it's that exploration that can't be done if you insist on writing in a non-native language), but even more so (b) something like, oh, Hamlet, the characters are entirely too three-dimensional and realistic and why aren't they called Greed and Wrath and Justice, let's kick Shakespeare out of the English lit scene.

Basically, everything that made Shakespeare Shakespeare (and Marlowe, and heck, William Byrd and Thomas Tallis, and...) would have been cut out. I mean, presumably we would have gotten some nice Latin medieval morality plays out of it... that no one would care about or read or put on, compared to how we feel about Shakespeare. So I assume what selenak means is, Fritz basically was encouraging stagnation in terms of artistic technique, and was against all the things (including the German language itself) that were actually at the time working to make German literature great.