MMH5.5 - Heroes of Might and Magic 5.5

Hello, I'm having an issue with the installation. I downloaded a mod specifically for playing the campaigns, but the text and voiceovers in the campaigns are in English, except for Tribes of the East, where both the text and voiceovers are in Russian. I tried installing additional Russian language packs for the campaign from the same link in the header, but it doesn't work without additional steps. If I replace MMH55-Cam-Dialogs-EN with MMH55-Cam-Dialogs-RU and MMH55-Cam-Texts-EN with MMH55-Cam-Texts-RU, and delete the previous files, the Russian text appears, but there are no voiceovers at all, which breaks the cutscenes. The game itself is initially Russian. How can I solve this problem?