Simply download it and play the game with ru-RU sounds, don't forget to download base addon for the player: https://www.curseforge.com/wow/addons/voiceover
Important: Curse sometimes stops the download before it is complete. The zip should be about 700MB. If it's not, you can download it from the GitHub:
download whole directory or download archive from github
and just place it under your addons folder at __classic-era__/interface/AddOns/AI_VoiceOverData_Vanilla
More info at GitHub Release: https://github.com/the-homeless-god/wow-voiceover/releases/tag/v1.2.0
This addon is designed to work in conjunction with the base addon: VoiceOver.
You must have the Player (VoiceOver Base Addon) installed for this to work.
VoiceOver Sounds - Vanilla includes voiceovers for Blizzard's Vanilla release of World of Warcraft.
Support
To support the development of this addon or simply say thanks, please contribute by clicking the donate button.
Link about documentation and development for this addon: https://habr.com/ru/articles/818513/
If you want to translate something specific or just translate to another lang so write me: https://t.me/the_homeless_god
If you want to buy me a coffee just subscribe to my channel: https://t.me/digitable_bot_sub