Corrected entry: Peter Sellers has the surname 'Bakshi' which isn't quite a South Indian surname though he speaks in a South Indian (specifically, Tamil) accent.
The Party (1968)
1 corrected entry
Directed by: Blake Edwards
Starring: Peter Sellers, Claudine Longet, Jean Carson, Natalia Borisova
Genres: Comedy
Deliberate mistake: Hrundi steps out to the garden and the sprinkler system turns on. Problem is, the grass is a blatantly fake rug with wrinkles everywhere. The sprinklers are therefore useless, and only used for comic purposes.
Hrundi V. Bakshi: What is this game you call to get the brightly colored balls in the hole?
'Wyoming Bill' Kelso: Pool.
Hrundi V. Bakshi: POO?
'Wyoming Bill' Kelso: Not poo! pool.
Hrundi V. Bakshi: Oh, POOO-EL.
'Wyoming Bill' Kelso: That's right.
Hrundi V. Bakshi: How many people can play this poo-el?
'Wyoming Bill' Kelso: Oh one or two or a whole bunch of people.
Correction: The fact that he does not have a South Indian surname simply means his FATHER was born elsewhere, not that he was. His family may have moved there when he was a baby, but what's the point of speculating about thing like that?