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  ===Valyrian===
  David J. Peterson, who created the Dothraki language for the first season of the show, was entrusted by the producers to design a new constructed language to depict Valyrian, the tongue of the fallen Valyrian Empire. After immersing himself in the fictional background, Peterson ended devising two languages: High Valyrian, the oldest form that was spoken at the height of the Empire and that in its purest form still exists as a language of scholarship and refinement, and the Slaver's Bay variety of Low Valyrian, a creolized version that is spoken in local dialects around the Slaver's Bay. The relationship between the two languages would be similar to the one between Classical Latin and Vulgar Latin.
  To translate sentences in Low Valyrian such as the ones spoken by Kraznys mo Nakloz and Missandei during the episode, Peterson would first write them into High Valyrian, and then apply a series of phonological, semantic and grammatical changes to the text.