If your HE tunnelbroker account's country is set to Russia, you'll show up as from Russia for Google since HE publishes a geofeed of ip range -> user account country for them.[1] You should be able to change it on the settings page.[2]

If that's not it, you an see which database maps your IPv6 range to Russia and contact them to ask them to change it.[3]

Of course, if you have accounts with a Russian addresses, then things will revert.

[1] https://tunnelbroker.net/export/google

[2] https://tunnelbroker.net/account.php

[3] https://www.iplocation.net/ip-lookup