I want to know the answer to the following question:
What is one of Boccaccio's works that helped promote the Italian language?
All the background I'm provided with is that "The application of the vernacular did not entail a rejection of Latin, and both Dante and Boccaccio wrote prolifically in Latin as well as Italian, as would Petrarch later (whose Canzoniere also promoted the vernacular and whose contents are considered the first modern lyric poems).". Is that enough to answer the question?