Foreign Langauges display as "???????" in Forums

When I post something under the group forums in a foreign language language such as Russian, it shows as “???????????”. However, foreign languages appear fine everywhere else, such as in activity feeds. Only forums are not internationalized. I am using Blogs MU Theme with most recent version of BP. I have lots of international users just waiting to dive into the forums if they can use it. I’d be grateful for any feedback!

Thank you,