This year as newer required an online meeting services. Unfortunately GoToWebinar still supports limited language list. A Russian-speaking people is an big audience over 200 million people.
All worldwide online conference providers offer a localized product but not GoToWebinar.
We're using your service about 2 year and ready to help your company to do prepare and release a Russian mailings, software interface and other related resources. I hope it can be interesting for you. Let me know if yes.