If there is no Russian or any other desired language in the settings, you need to do the following steps.
1. Go to the Windows Control Panel (press Win+R at the same time, type "control" and press ENTER).
2. Launch "Programs and Components"
3. Find the Adobe Acrobat program in the list and right-click edit.
4. Next button.
5. Select the desired languages from the list of available
6. Refresh button.