if you don't want to get stuck for 2-3-4 months of endless edits, then it's better not to touch anything, believe me
let others do the work for you
look, moonstar is slowly churning out fixes with rommi; maybe someday—or never—I'll actually finish the final version of my text fix-mod and post it on the forum again. Just pull from those mods at your own pace; you're better off not diving in yourself, it's a darkness in there 
P.S. simply because the main trouble isn't even the errors—of which several hundred have already been found—but rather that the game text was clearly written by several people who didn't interact with each other at all, and some, I am certain for some reason, had never played Heroes once. Because of this, you sometimes find such absurd and stupid mistakes and crooked/false descriptions in places where they shouldn't even be