Hey. I've decided to view a forum thread in Toribash Forums but something is wrong. The language is Russian.
And it gets worse since it happened on other pages of the website. Is there any solution of this tomfoolery that's happening?

If I had to guess, it's just the content of the posts in Russian, not the actual website language. Can you link one of the posts you're talking about? They're probably genuinely written in Russian by the author of the post, a lot of people in the Toribash community are Russian.

Forums can switch to russian if you follow a link that explicitly sets the language (e.g. https://forum.toribash.com/?langid=2). To revert back to English, do ?langid=1 or restart your browser / clear session cookies for toribash.com.