Trần Nhân Tông
Trần literature had a special role in the history of Vietnamese literature for its introduction and development of the Vietnamese language (Quốc ngữ) written in chữ nôm. Before the Trần dynasty, Vietnamese was only used in oral history or proverbs. Under the rule of the Emperor Trần Nhân Tông, it was used for the first time as the second language in official scripts of the royal court, besides Chinese.