Other mistake: When Katherine reserves a room at a hotel she talks German. From her weird diction it's obvious that Sigourney Weaver has somehow memorized the text without actually knowing what she is saying. (00:21:50)
Suggested correction: Sigourney Weaver apparently knows German, so this mistake is wrong. Also, it sounds like she is conversing in German like a natural, and it sounds like conversational German to me.