Game of Aces

Game of Aces is a 2016 World War I action film written and directed by Damien Lay, in his debut in helming a fiction feature. The film stars Chris Klein, Victoria Summer and Werner Daehn whose role is as a German double-agent with all of his dialogue in German with English subtitles; Summer also speaks German for most of the film.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.