Okay, the definitions here for thIngan are (the) Klingon / Klingon (person) / klingon. A previous definition also mentioned Klingon (language).
So I tried "Klingon works" as in 'Klingon is a reasonable language for us to converse in, it works for me'. And was told that the correct solution was "A Klingon works". So a) where did the indication that this applied to a A SINGLE Klingon come from, and b) is the definition of vum = works specific to 'performs a task in exchange for something', or does it also mean (as it does in English) 'functions appropriately'?