Noun, Suru verb, Transitive verb
localization (of software, etc.); localisation
とある映画を文庫化した―いや、映画の為に書かれたシナリオを小説として加筆修正し、日本語にローカライズしたものだ。A certain movie was novelized - rather it was a scenario written for a movie that was expanded as a novel and localized to Japanese.