While I'm not fluent or even conversational in Klingon, I've picked up a handful of phrases from the movies and can even half-ass my way through one drinking song, all of which came in handy during my last improv comedy show when we had to do funny accents and one of the audience suggestions was Klingon. Even for all the geek pedigree in the troupe (including an obsessive Stargate SG-1 O'Neill/Carter 'shipper and a frequent Star Wars Rebel Legion costumer), I'm the only one that even knows enough Klingon to reasonably fake it properly.