The rigidity of this translation is what makes it nonsensical. For anything countable, the meaning of law' makes law'wI' inherently plural. It could be translated as "the many," just as qanwI' can be translated "the old."
As a substitute for a mass noun, law'wI' could be translated "much." None of which means Klingons actually use the term law'wI', but even if they don't, I expect they'd get your meaning.

~mIp'av