The html element on the page has a dir="ltr" attribute. This forces the page to display text in left-to-right direction.
<html lang="mul" dir="ltr">
Changing to dir="rtl" shows that the page responds well, except the top 10 wikis section. Wikis are positioned absolute around the globe, without any RTL overwrite, that's why their position doesn't change.
Forcing LTR doesn't seem to be a good practice. If the navigator is set to display text in right-to-left, why would we go against it?