'Errementari (the devil and the blacksmith)' trivia and fun facts

The language of the movie is a lost dialect of euskera

In the film based in XIX century they use a lost dialect of euskera language and they had to hire an investigator and linguist Koldo Zuazo.

Inspired in a basque child story

The idea of 'Errementari (the blacksmith and the devil)' is inspired in a traditional basque child story called "Patxi Errementaria" which tell the story about an evil blacksmith who is feared even by the Demon itself.