Since yesterday some of you have been reporting the forum language changing randomly to Japanese , Finnish and other languages.
This has nothing to do with the ERTAC forum, and is not part of the testing we are under at moment (I hope but you never know with Dr Elizabeth)
It is a known bug from the Discourse platform
Refreshing your webpage or closing it and reopening it seems to solve this problem.
Let me know if you have something different related to this.