Just to clear any confusion:
- The Russian client is officially supported for World of Warcraft: Forever, as mentioned on the shop’s page
- We’re aware that players using the Russian client are currently unable to access the different rulesets, and we are looking into this issue
- As a temporary workaround, you can try to use the client of another language (English, French, etc.) to create a character (to create characters using names in Cyrillic, this workaround will unfortunately not work, and we will need to wait for our developers to resolve this issue)
Hope this helps. 