That's okay. Well, I would say East Prussia is definitely Germany. Same architecture, especially in the larger towns and cities. Protestant churches like the Immanuel Kirche in Schirwindt, typical German official buildings and so on. A fast google on East Prussian towns like Goldap, Gumbinnen and Königsberg will confirm that.
I also see there aren't really autumn textures for the discolouring autumn trees, but that's okay, since I have a good mod for that, which will hopefully still work.