Since its creation for Star Trek, Klingon has evolved into a phenomenon. Andy Ridgway quizzed US linguist d'Armond Speers - who spoke only Klingon to his son for the first three years of his child's life - on useful everyday phrases.
Read the full story of the battle between the Klingon and Na'vi languages in the June edition of Focus magazine, on sale 6th May in newsagents in the UK. Or call 0044 1795 414 699 to order a copy if you're abroad.
Click the audio below to hear d'Armond translate phrases:
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More audio phrases:
More Klingon and Na'vi: