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When HBO’s Game of Thrones aired from 2011 to 2019, it revolutionized television. Part of its genius was linguistic world-building. Characters didn’t just speak English with accents; they spoke real, constructed languages: (the horse-lord tongue), High Valyrian (the Latin of this universe), Astapori Valyrian , Low Valyrian , Skroth (the White Walkers’ ice-cracking language), and even a smattering of Old Ghiscari .