How to begin translating the language in a film?

Hey l have a question lm planning to translate language in a film to lithuanian language and l wont to know is l alraedy known the language that lm g

Hey l have a question l'm planning to translate language in a film to lithuanian language and l wont to know is l alraedy known the language that l'm gona translate but do l need to use a camera to film the entire film that l'm gona translate and by filming l meant to say do l need to start translating whyle l'm filming the film ?
and please if someone can please awnser this question because l'm planning to get a job as a film translator

P.S Sorry for the bad english l hope you can understand what l'm trying to say

or:Hey l have a question l'm planning to translate language in a film to lithuanian language and l wont to know is l alraedy known the language that l'm gona translate but do l need to use a camera to film the entire film that l'm gona translate and by filming l meant to say do l need to start translating whyle l'm filming the film ?and please if someone can please awnser this question because l'm planning to get a job as a film translator P.S Sorry for the bad english l hope you can understand what l'm trying to say

or:Film it first, then try lip syncing it in your prefered language

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