謝謝指正！

維基上看來的：

He has been called the 'father of English literature', or alternatively, the 'father of English poetry'.

A prolific writer, Chaucer has been seen as crucial in legitimising the literary use of Middle English at a time when the dominant literary languages in England were still Anglo-Norman French and Latin.

英國語言文學史，一個更大的宇宙等待我發掘 ;-)