You might first want to discover what Chaucer's nationality was. He is credited with being the first poet to write in the English vernacular.
Dante
Dante Alighieri
Dante Alighieri was an Italian poet that lived and worked during the Middle Ages. He was the first writer to produce a significant work in a vernacular national language.
Dante Alighieri
Manfred Clynes is the first writer to use the word cyborgs to explain the hybridization of man and machine. Fifty years have passed since the term was coined and entered into the vernacular.
Chaucer would have been addressed both in Latin and French while at home in England. His churchmen would speak Latin and his lawful superiors, the Normans, would, of course, speak French. What made Chaucer a remarkable author was that he, first, wrote in the language of his fellow commoners, English.
Jean Genet
1) the first to write well in Middle English; 2) the first to achieve fame using the English vernacular or common language; 3) the first poet to be buried in Westminster Abbey; 4) among the first to be published on Caxton's printing press Benito The name :)
Geoffrey Chaucer is often considered one of England's first great writers due to his significant contributions to English literature in the 14th century. His work, particularly "The Canterbury Tales," helped to establish English as a legitimate literary language. While there were notable writers before Chaucer, he is widely recognized for his impact on English literature.
His extensive use of English vernacular from his time that used in his stories, particularly in The Canterbury Tales.
Dante Alighieri was the first Italian writer, politician, and poet to write in the vernacular Italian language. His most famous work, "The Divine Comedy," played a significant role in establishing Italian as a literary language.
I believe it was Denis Diderot.