As Chulpan Khamatova did not speak enough German to improvise properly, she had to learn her (grammatically correct) sentences word for word. Because this did not sound natural, all of her phrases were translated into Russian and then translated back word for word to get a natural Russian accent with all typical grammar mistakes. See more

Goofs

Denis wears a "digital rain"-style T-shirt in 1989 because he has developed the idea himself and has come up with an idea for a film exactly like Matrix , which he describes in a deleted scene (the letters are not identical to the Matrix scheme.) The joke is that the idea originated in East Germany; compare the claim in one of Denis's fake news shows that the Coca-Cola formula was invented there. It also ties in to the film's main theme of keeping people in a simulated reality. See more