Currently the vert files are deliberately disabled, because frankly I don't understand them.
It may be that I can just enable them and they will just work for you.
If you can grab the Japanese_vert.traineddata file, rename it to something like JapaneseVert.traineddata and put it in the Custom folder, it might “just work” - if so, let me know and I'll see what I can do about enabling them going forward.