This just started happening today. The 404 (and in this case by extension 403) error page displays Russian for the list headers. My interface language is currently English (US). My Windows display language is currently English (United States). Is this occurring for anyone else?
Which topic did you try to access?
Your language isn’t set to Russian.
Nevermind, it fixed itself. Weird.
EDIT: It looks like this occurred on Discourse Meta before. There is a solution here for any admins reading this:
His language was set to english.
Must have been a system error.
Yes probably, I misunderstood it lol. It looks like a glitch.