I had to put it in the actual data folder for it to work.
I made a file that just had my "new wargs" in it, and the map was still messed up. When I put it straight into the data/English folder, suddenly, it worked.
I guess there's just no way around it. Is this a known/intended design? Just asking because the game is mod friendly. Just seems out of character for this to work like it is.
@Humility - wow really? Man, I guess the wargs don't like me