If you are using an older DRM-free version of the game, you can manually add the Russian localization file.
: If you are looking for the fan-made mod "A Cure for Dreams" (which adds a Misha/Kristina route), the 2nd Act for Kristina's route was released separately on itch.io . skachat katawa shoujo act 2 rus
: Locate the lang-ru.rpa file from community guides like those on Steam Community or VK . Installation : If you are using an older DRM-free version
: This version contains the full game, including the prologue, Act 1, and the three subsequent acts for every character route. Option 2: Manual Russian Patch (Legacy/Non-Steam) including the prologue