If I'm not mistaken, you would need to change your language settings and you may also need to have the font needed (requested) with Russian glyphs. Another thing you can do is re-type the glyphs in Illustrator using the glyph chart tool and you would need a font with the Russian glyphs included. MyFonts does sell some fonts with both English & Russian glyphs (Russian alts) for the American market. Any font from Paratype comes to mind. Hopefully that will help some.
I better learn all I can about this one ....with the ever increasing Russian community growth around here, I can't believe I've not been faced with more than one like request. Aargh!