Following are the definitions of the words Editor, Copy Editor, Proofreader, Reader and Corrector. The French Editor (réviseure or réviseur in French) does the same job as the English one, with texts translated from English into French, insuring that the final texts in English and French match each other.
Definitions from TERMIUM Plus®
editor, copy editor
A person whose work is editing and correcting the grammar, punctuation, etc. of articles or manuscripts, as in a newspaper office or publishing house.
proofreader, reader, corrector
A person who reads (copy or printer’s proofs) to detect and mark errors to be corrected.