Yeah, there's nothing in that folder when I looked in the zip file. I assume that it's just missing from the download. I haven't run into any errors related to the folder, yet.
EDIT:
A rough translation has been included in the first post.
It makes the menu English and some of the battle details (Stamina, morale, unit type, etc.) English as well. Also, to help with the new factions (Skaven, Tomb Kings, Norsca), their unit names have been translated to make it easier for bug-testing. I have yet to get to the unit for the older factions.
There's a lot that hasn't been translated, so bear with me as I make my way with the translations.