 The inscriptions on the walls and doors in the hospital are all in  German, but do not make any particular sense when translated. The  inscription "Gehirn Hygiene" for example is a rough translation of  the English "brain sanitation" into German. Maybe the German  inscriptions were just supposed to add a more gothic atmosphere to  the movie, but quite certainly they are also a reference to an old  German Horror movie _Schloß Vogeloed (1921)_ (qv) directed by  F.W. Murnau (qv), which also deals with a haunted manor.