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
In what country is the 2017 film "Village Rockstars" set?
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What film is about a curator of the X-Royal art museum in Stockholm?
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Who directed the Oscar winning film "Roma"?
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Which actor played Sir Lancelot in the 1975 film "Monty Python and the Holy Grail"?
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Who directed the 1963 film "8 1/2"?
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In the 2007 Mexican film "Bad Habits", what did Matilde believe she had to do to save the world?
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Which of these films is a foreign film directed by Guillermo del Toro?
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Who is the actor who appeared in the Swedish film "White Water Fury" and played Eric in the TV series "True Blood"?
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