Hello,
@Peter
If you have already installed Exchange AND the language pack bundle on a server running an English OS, you can install the German OS language pack. You will then get EMC in German. Having installed the German OS language pack before installing Exchange would have displayed setup in German. In all cases when you install the language pack bundle; all the supported client and server languages are available.
@Valery
No, you can’t. The language pack bundle is installing all the server and client languages available. There is no supported process to install or remove a specific language.
@Michael
At this time, I don’t have any specifics about the Russian UM language pack
Regards,
-Michel Lopez
Exchange Localization Program Manager