Description
mixed 
mb_language ( [string language] )
     mb_language() sets language. If
     language is omitted, it returns current
     language as string.
    
     language setting is used for encoding
     e-mail messages. Valid languages are "Japanese",
     "ja","English","en" and "uni"
     (UTF-8). mb_send_mail() uses this setting to
     encode e-mail.
    
 Language and its setting is ISO-2022-JP/Base64 for
    Japanese, UTF-8/Base64 for uni, ISO-8859-1/quoted printable for
    English.
    
     Return Value: If language is set and
     language is valid, it returns
     TRUE. Otherwise, it returns FALSE. When
     language is omitted, it returns language
     name as string. If no language is set previously, it returns
     FALSE.
    
     See also mb_send_mail().