David J. Peterson constructing Dothraki Valyrian languages Duolingo Westeros Valyria
Although the common language of Westeros is represented as English, the producers charged linguist David J. Peterson with constructing Dothraki and Valyrian languages based on the few words in the novels. Before production, Peterson wrote 300 pages of Dothraki language material, including translation and word function. Dothraki and Valyrian dialogue is often subtitled in English. Language-learning company Duolingo began offering courses in High Valyrian in 2017, of which 1.2 million people signed up for between 2017 and 2020.
