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  ===Astapori Valyrian===
  The first derivative Valyrian language to be featured in the series was Astapori Valyrian, a variety from the city of Astapor in Slaver's Bay. It appeared in the third-season premiere episode "Valar Dohaeris".  Peterson created the Astapori dialogue by first writing the text in High Valyrian, then applying a series of regular grammar and sound changes to simulate the changes in natural languages over a long period of time.
  For example, Astapori Valyrian has lost all long vowels (designated with a macron) and most diphthongs. Between vowels, b, d, g have become v, ð, ɣ; subsequently, p, t, k have become b, d, g in the same environment.
  As a result, an "Unsullied" is rendered as ''Dovaogēdy''  in High Valyrian, but as ''Dovoghedhy''  in Astapori. Similarly, Astapori Valyrian has lost the case system of High Valyrian, so the word order is more reliably subject–verb–object (SVO) and the four genders of High Valyrian have been reduced to two, with three definite articles: ''ji''  (animate singular, derived from High Valyrian ''ziry''  "him/her (accusative)"), ''vi''  (inanimate singular, derived from High Valyrian ''ūī''  "it (accusative)"), and ''po''  (plural, derived from High Valyrian ''pōnte''  "them (accusative)"). There is also an indefinite article, ''me'' , derived from High Valyrian ''mēre''  ("one"). Word stress is less predictable than in High Valyrian, but commands are stressed word-finally (for example: ''ivetrá'').