You could get him a foreign language teacher from a well-known company called Language Link. Their group language courses are generally longer-term, but this might be a good way for him to get interested in a new language.
You can post in some of the bigger facebook groups to see if anyone in the community is willing to take him on as an unpaid intern. I suggest Moscow Expat Life and Moscow Expats. Also check out http://www.expat.ru forums.