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Having a See also to Ugly American is perfectly reasonable for those too young to recognize the term, or for non-English speakers who use English WP as a general resource without having a native speaker's grasp of the language.
You do not need to provide a quotation from the director stating, ""Yes, our title is a reference to the commonly used English language expression, Ugly American. What are you, a little simple-minded? That's obvious.""
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