The fact they weren't FA is strange.
as for the names, that's probably because the previous(German) owner have bought these Russian players, and when the new owner came by the became German since new owners always get players with their own nationality.
This is the lineup for one of the games played by the previous owner, and all the players have ID's in the same range as if they were part of one team's original players. So unless the previous owner bought the entire roster of a Russian team, it appears that they were given Russian names.
Levchenkov, Alexey
Andreev, Alexey
Kazachenko, Yan
Anchugov, Anatoly
Khvostikov, Nazar
Svinolobov, Matvey
Barancheev, Vadim
Staskevich, Timur
Kletskov, Innokenty
Vakhrushkin, Sergey
Govyadin, Daniil
Gomon, Nikolay
There have been similar problems reported (and fixed) in other countries. I just thought it a bid odd.