libretto [librettos](text of a dramatic musical work, such as an opera) noun [UK: lɪ.ˈbre.təʊ] [US: lə.ˈbreto.ʊ]
script [scripts](text of the dialogue and action for a drama) noun [UK: skrɪpt] [US: ˈskrɪpt]He writes scripts for TV shows. = Él escribe libretos para TV.