Redmine

Hello,

Can you cooperate with assistance about how to install locals on CentOS 6.
When user language is changing, pages like Admin Settings and User profile gives error 500, if the language is not English.

Environment:
  Redmine version                2.4.2.stable
  Ruby version                   1.9.3-p484 (2013-11-22) [i686-linux]
  Rails version                  3.2.16
  Environment                    production
  Database adapter               Mysql2

CentOS6
cat  /etc/sysconfig/i18n
LANG="bg_BG.UTF-8" 
SYSFONT="latarcyrheb-sun16" 

[root@crm ~]# locale
LANG=bg_BG.UTF-8
LC_CTYPE="bg_BG.UTF-8" 
LC_NUMERIC="bg_BG.UTF-8" 
LC_TIME="bg_BG.UTF-8" 
LC_COLLATE="bg_BG.UTF-8" 
LC_MONETARY="bg_BG.UTF-8" 
LC_MESSAGES="bg_BG.UTF-8" 
LC_PAPER="bg_BG.UTF-8" 
LC_NAME="bg_BG.UTF-8" 
LC_ADDRESS="bg_BG.UTF-8" 
LC_TELEPHONE="bg_BG.UTF-8" 
LC_MEASUREMENT="bg_BG.UTF-8" 
LC_IDENTIFICATION="bg_BG.UTF-8" 
LC_ALL=

Thank you for the help in advice.