I'm not sure it was the language or the poor acting, but everything about this movie feels and looks cheap and fake.
After seeing Der Untergang this is a huge disappointment. There's no connection between different scenes, and the acting is so incredibly poor I couldn't even believe people could make such a mess of something that had great potential.
And above all, everyone in Germany speaks English. Big mistake. The German language has a certain sound to it, and especially Hitler himself only sounds like Hitler when he's speaking/yelling German.
The way the story is told made me believe it was improvised on the spot, the characters were empty and the movie seems to be a collection of random events that could have happened.
Whether it's the English or the fact that I've already seen Der Untergang, everything about this movie was fake and ridiculous.