Being an actor is all about having recall and memory in your arsenal - especially when you're known for more sci-fi and fantasy roles with complex lines and the like.
When it comes to a constructed language, say like Dothraki, it's something you just have to memorise and memorise until it's buried in your head - and then use on late night talk shows when you're promoting a film.
That's pretty much what happened with Jason Momoa, who managed to rattle off a few lines of Dothraki to Sarah Milican - who really got into it, it must be said - and Hugh Grant - who was also kind of into it.
Take a look.
