The plot was about secret service or agency investigations, how the suspect is treated. The words in the dialogues are exactly the same. The setting was limited, i think it was only the two offices/investigation rooms in the respective countries. First part of the movie is one investigation, then it changes to the other country, while repeating the same lines of text, but now with different/opposite meaning. The cast is very small, I think just two main actors, a lady and a man.
I think I watched this around 15 years ago.