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  ===Creation===
  David J. Peterson, creator of the spoken Valyrian languages for ''Game of Thrones''
  To create the Dothraki and Valyrian languages to be spoken in ''Game of Thrones'', HBO selected the linguist David J. Peterson through a competition among conlangers. The producers gave Peterson a largely free hand in developing the languages, as, according to Peterson, George R. R. Martin himself was not very interested in the linguistic aspect of his works. The already published novels include only a few words of High Valyrian, including ''valar morghulis'' ("all men must die"), ''valar dohaeris'' ("all men must serve") and ''dracarys'' ("dragonfire"). For the forthcoming novel ''The Winds of Winter'', Peterson has supplied Martin with additional Valyrian translations.
  Peterson commented that he considered Martin's choice of ''dracarys'' unfortunate because of its (presumably intended) similarity to the Latin word for dragon, ''''. Because the Latin language does not exist in the fictional world of ''A Song of Ice and Fire'', Peterson chose to treat the similarity as coincidental and made ''dracarys'' an independent lexeme; his High Valyrian term for dragon is ''zaldrīzes''. The phrases ''valar morghulis'' and ''valar dohaeris'', on the other hand, became the foundation of the language's conjugation system. Another word, ''trēsy'', meaning "son", was coined in honour of Peterson's 3000th Twitter follower.
  Peterson did not create a High Valyrian writing system at the time, but he commented that he "was thinking something more like Egyptian's system of hieroglyphs—not in style, necessarily, but in their functionality. Egyptians had an alphabet, of sorts, a couple of phonetically-based systems, and a logography all layered on top of one another." In the third season's episode "The Bear and the Maiden Fair", Talisa is seen writing a Valyrian letter in the Latin alphabet, because according to Peterson, "it didn't seem worthwhile to create an entire writing system for what ultimately is kind of a throwaway shot".
  At the start of June 2013, there were 667 High Valyrian words.