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.
| Writing | Rafael Azcona | Screenplay |
| Sound | Alejandro Amenábar | Music |
| Writing | Manuel Rivas | Novel |
| Writing | José Luis Cuerda | Screenplay |
| Directing | José Luis Cuerda | Director |
| Sound | Ricardo Steinberg | Sound Designer |
| Editing | Ignacio Cayetano Rodríguez | Editor |
| Camera | Javier Salmones | Director of Photography |
| Directing | Pedro Loro | Assistant Director |
| Directing | Carmen Soriano | Script Supervisor |
| Art | Balter Gallart | Set Decoration |
| Costume & Make-Up | Sonia Grande | Costume Design |
| Production | Jose Maria Iresteiro | Associate Producer |
| Production | Fernando Bovaira | Executive Producer |
| Directing | Mateo Gil | Assistant Director |
| Costume & Make-Up | Teresa Rabal | Hairstylist |
| Production | José Luis Cuerda | Executive Producer |
| Production | Emiliano Otegui | Line Producer |
| Production | Ana Míguez | Producer's Assistant |
| Directing | José Ramón Otegui | Assistant Director |
| Art | Josep Rosell i Palau | Production Design |
| Directing | Walter Prieto | Assistant Director |
| Editing | Nacho Ruiz Capillas | Editor |
| Costume & Make-Up | Ana López-Puigcerver | Makeup Designer |
