De zevenjarige Moncho is bang voor zijn leraar, omdat zijn broer angstaanjagende leugens heeft verteld over deze zogenaamde wrede leraar. In werkelijkheid introduceert deze leraar zijn studenten in de wereld van poëzie en de natuur.
Nee, helaas is La lengua de las mariposas nog niet beschikbaar op Netflix in Nederland.
| Directing | José Luis Cuerda | Director |
| Writing | Rafael Azcona | Screenplay |
| Writing | José Luis Cuerda | Screenplay |
| Writing | Manuel Rivas | Novel |
| Sound | Alejandro Amenábar | Music |
| Sound | Ricardo Steinberg | Sound Designer |
| Camera | Javier Salmones | Director of Photography |
| Editing | Ignacio Cayetano Rodríguez | Editor |
| Editing | Nacho Ruiz Capillas | Editor |
| Art | Josep Rosell i Palau | Production Design |
| Art | Balter Gallart | Set Decoration |
| Costume & Make-Up | Sonia Grande | Costume Design |
| Costume & Make-Up | Ana López-Puigcerver | Makeup Designer |
| Costume & Make-Up | Teresa Rabal | Hairstylist |
| Directing | Carmen Soriano | Script Supervisor |
| Production | Fernando Bovaira | Executive Producer |
| Production | José Luis Cuerda | Executive Producer |
| Production | Jose Maria Iresteiro | Associate Producer |
| Production | Ana Míguez | Producer's Assistant |
| Production | Emiliano Otegui | Line Producer |
| Directing | Mateo Gil | Assistant Director |
| Directing | Pedro Loro | Assistant Director |
| Directing | José Ramón Otegui | Assistant Director |
| Directing | Walter Prieto | Assistant Director |
