(There's no video for cRussify Mac yet. Please contribute to MR and add a video now!)
cRussify is "Macintosh Russification the easy way."
What cRussify does is patch your US English Mac OS system to "understand" Russian script. It does not use extensions or control panels as opposed to other solutions, so it supposedly is crash-free.
INSTALL_cRussify_Mac_v1.1.1.sit (492.55 KiB / 504.37 KB)
cRussify v.1.1.1 installer for Mac OS 7.5 and up / compressed w/ Stuffit
cRussify_Mac_2.5.sit (1.16 MiB / 1.21 MB)
cRussify v.2.5 installer for Mac OS 8 and up (1999) / compressed w/ Stuffit
Mac OS 7.5 and up
Important: Only proceed if you have a complete backup of your System, just in case something goes wrong.
Emulating this? It should run fine under: SheepShaver