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I'm toying with the idea of translating the communist manifesto, and to do that one would require a working klingon term for worker that could be adapted for use when referring to the proletariat as a whole aswell.
Comment below with feedback and suggestions.
I was tempted to say vumwI' would work for worker, but vum as a name as a negative meaning, and you probably do not want that. Proletarian is a very specific term, and I am not sure it would have a similar etimology in Klingon. You probably want to have something like "the worker class". So maybe having a way to talk about social classes could be useful, and a way to extend it to this topic.
vumwI' should honestly be pretty good in the Manifesto for "worker": lIngmeH mIw luSeH vumwI' "the workers control the means [lit. "process"] of production". And as for the negative meaning of vum as compared to vumwI', I wouldn't worry about it – we don't stress ourselves that the English word assistant begins with ass, after all.