To use, copy/move/symlink the files to either /usr/share/kak/autoload/rc/filetype/ (for some UNIX-based OS's, check where yours' system-wide configuration files reside), or to ~/.config/kak/autoload/, wherein it is assumed /usr/share/kak/autoload/rc/ has been symlinked.
All j903 primitives appearing on NuVoc are highlighted. The bitwise operation m b. I have added to verbs, since it is a verb, not an adverb, as I see it. All parts of speech, most/all numerals, foreigns are grouped. You can change the colors to ones for sure defined in a color scheme, red, blue, green, white, black, etc., if you'd like. With a fairly dark background color of #170e12 it appears as follows: 
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Based off the provided syntax file for shell, would like to achieve something akin to this, but I can't wrap my head around recursive regexing yet.
Based off the provided syntax file for ledger, very little changed. I can guarantee that a basic double-entry file will render proper, but given I don't know how much hledger and ledger differ, everything else is up in the air for now.