I can attach the generated site files if that's an alternative temporary solution.
I'd like to look at them as a sanity check in any case, to be sure they render OK on my system. Can you attach just one, say for instance ja_JP/index.html, so that I can confirm it works right here?
If there's a way to change the locale for forrest alone that would be a better solution. But I still can't get the PDF to generate properly. See
CONNECTORS-387. Maybe you will have better luck. Posting to the forrest user's list sounds like a good idea for that one.