Foreign Films

In the foreign film 'Oldboy', directed by Park Chan-wook, the primary language spoken is which of these?

More Questions from Foreign Films
What film is about a French ballistic missile submarine?
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Who directed the Oscar winning film "Roma"?
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Who co-wrote, with Roberto Rossellini, the story and screenplay for the 1954 film "Journey To Italy"?
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For what reason does Krank kidnap children in the 1995 film "The City Of Lost Children"?
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Which actor played King Arthur in the 1975 film "Monty Python and the Holy Grail"?
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In what decade is the 2018 film "Cold War" set?
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Which actor played the role of Cheyenne in the 1968 film "Once Upon a Time in the West"?
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Who directed the 2001 French film "Amelie"?
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