If you specifically need the Spanish translation (where instructions like "Allegro" or "Dolce" are translated), you are likely looking for the edition published by Rivera / Música Moderna . These are not public domain, but are widely available for purchase in Spanish-speaking music stores.
: This volume typically covers complex exercises for soprano voices. solfeo de los solfeos 4 pdf
: Community-driven platforms like MuseScore often have transcriptions of individual lessons from the series. Solfeo De Los Solfeos by Lemoine y Carulli sheet music If you specifically need the Spanish translation (where