Ever wondered how the fictional languages in Game of Thrones are developed?

It's David Peterson's job to come up with the made-up languages like Dothraki and Valyrian - he invents the sounds, the structure, even the grammar.

Radio 1 Newsbeat asked him to translate some erm... essential phrases into Dothraki - ahead of the show's final season, which is out from 14 April.

Filmed by Woody Morris and edited by Tyler Anderson.

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