@mandelgado58
Diccionario Esencial Français Espagnol is reconstructed and uploaded
here. It was a badly converted ePub, so there is a repetitive string
inflexiones in the definitions. In the ePub there is even a missing image in front of it. So maybe you shouldn't let Calibre convert it and put the unencrypted, unconverted dictionary in a dropbox link. (Calibre unencrypts the documents when they are first added, no consecutive conversion is needed.
)