This thread is resolved. Here is a description of the problem and solution.
Problem: Translate the strings "Choose File" and "No file chosen" on the contact form 7
Solution: The strings are added by the browser and its language completely depends upon the user's browser language, so WPML cannot translate this field.
If a user has browser language French, uploader language would be in French.
This is the technical support forum for WPML - the multilingual WordPress plugin.
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