Etienne Chatiliez's idea -a big boy nearing thirty still living with his folks - for his "Tanguy" was not that much new,by a long shot.Jean -Paul Le Chanois's hero did the same in 1954;take law instead of Chinese and you've got a "new" screenplay.
THat said,"Papa ,Maman,la bonne et moi" is a rather clumsy comedy ,Gaby Morlay playing -as an amateur- Marguerite Gautier at fifty-something does not exactly equal Garbo.It' s not very funny all in all,and there are not many surprises for the audience.
Le Chanois,one of the betes noires of la nouvelle vague,was a former critic in "les cahiers du cinema" though,this magazine in which Truffaut and co cut their teeth in the fifties.
This is now some kind of document of a time when petits bourgeois like Lamoureux's family used to live in the same apartment building than the proles.(with one significant difference:the rich used to live on the lower stories ,the less-than-wealthy in the rooms with slopping ceilings up where they belong ,so to speak.)