As far as I know in America they do say to see a movie.

I think it's better to use the verb WATCH instead SEE.'Cause in English they say:watching a movie but I never heard seeing a movie.

"Is there any native wanna give us the reason why sometimes you use 'see' and sometimes use 'watch'?"
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I've never really thought about this before, but as a general rule of thumb, you use the verb "to see" if you actually go to the cinema.&nbsp;
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E.g.
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Person 1: Does anyone fancy going to the cinema?
Person 2: Yeah, what do you want to see?
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Person 1: Do you want to go see Batman tonight?
Person 2: Nah, I think I'll sit in and watch something on Netflix.
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Is there any native wanna give us the reason why sometimes you use 'see' and sometimes use 'watch'?
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I watched Temptation : Confession of a Marriage Counselor.
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I watched The Two Towers yesterday, I love The Lord of the Ring.