When the two Duchemins have infiltrated Tricatel's factory and the shovel from the crane goes back up in the air, you can hear the motor sound of the crane as if they stood right beside it. However, the crane stands way outside the factory.
Margrit, the substitute secretary, mentions in her interview that she can speak Swedish (the actress herself is a Swede) but later on reveals that she is Dutch ; yet she does not mention that she can speak Flemish during the interview, along Italian, French, English, and Swedish.