Horribly enough, one translator is currently trying to overwrite the Japanese translation, destroying previous translations.
He is trying to change the content of translations intentionally into completely different words and submit them to GitHub (some strange translations have already been submitted and released as official translations in the last update) .
Even in Japan's RimWorld community, there are discussions about this translator's work. Most of the opinions are "Please don't change item names etc. into completely different words after the official version."
Unfortunately, Now the link with the official translation community is weak, so only the opinions of some people are passing through.