Hi.

Cyrillic char 'я':
-- cut --
        character: я (1103, #o2117, #x44f)
preferred charset: unicode-bmp (Unicode Basic Multilingual Plane (U 
+0000..U+FFFF))
       code point: 0x044F
           syntax: w 	which means: word
         category: .:Base, Y:2-byte Cyrillic, c:Chinese, h:Korean,  
j:Japanese, y:Cyrillic
      buffer code: #xD1 #x8F
        file code: #xD1 #x8F (encoded by coding system utf-8-unix)
          display: by this font (glyph code)
    nil:-apple-Monaco-medium-normal-normal-*-20-*-*-*-m-0-iso10646-1  
(#x1C0)

Character code properties: customize what to show
  name: CYRILLIC SMALL LETTER YA
  old-name: CYRILLIC SMALL LETTER IA
  general-category: Ll (Letter, Lowercase)

There are text properties here:
  c-in-sws             t
  face                 font-lock-comment-face
  fontified            t
-- cut --

English char 'z':
-- cut --
        character: z (122, #o172, #x7a)
preferred charset: ascii (ASCII (ISO646 IRV))
       code point: 0x7A
           syntax: w 	which means: word
         category: .:Base, a:ASCII, l:Latin, r:Roman
      buffer code: #x7A
        file code: #x7A (encoded by coding system utf-8-unix)
          display: by this font (glyph code)
    nil:-apple-Terminus-medium-normal-normal-*-20-*-*-*-m-0-iso10646-1  
(#x5E)

Character code properties: customize what to show
  name: LATIN SMALL LETTER Z
  general-category: Ll (Letter, Lowercase)

There are text properties here:
  c-in-sws             t
  face                 font-lock-comment-face
  fontified            t
-- cut --

Terminus font (english and russian layout) works very well in  
TextEdit.app.