His play
Canace, based on a
Greek legend of incestuous love, was only performed once; but was widely diffused, and (together with
Giraldi's play
Orbecche) led to literary debates on tragedy and theatrical morals through to the next century. Speroni's
Dialogo delle lingue (1542) greatly influenced
French Renaissance thinking about the French language; it formed the basis of
Joachim Du Bellay's
Deffense et illustration de la langue française (1549) and inspired in part the literary studies of
Claude Fauchet. Speroni was a friend and supporter of
Venetian-language playwright
Angelo Beolco (el Ruzante). His
Dialogo delle lingue was an important source for
Joachim du Bellay's
Défense et illustration de la langue française. ==References==