Why did authors during the renaissance begin to write more in the vernacular?

Answer 1

they were influenced by Dante Alighieri who often wrote in his native language of Italian instead of Latin.

Answer 2

Authors in the Renaissance began to write more in the vernacular because they wanted to reach a wider audience beyond the elite who could read Latin. Writing in the vernacular made texts more accessible and allowed for the spread of ideas to a broader range of people.