I have 2 lang for example my start panel is english but the submenus are in bulgarian.Right click is english control panel is bulgarian.....
Notice that Priority is not obligatory

Result of locale
Code:
beastfx@16431879199042:~$ 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=

Result sudo aptitude show language-support-bg
Code:
beastfx@16431879199042:~$ sudo aptitude show language-support-bg
Package: language-support-bg
State: installed
Automatically installed: yes
Version: 1:8.04+20080214
Priority: not obligatory
Section: translations
Maintainer: Language pack maintainers <language-packs@ubuntu.com>
Uncompressed Size: 32,8k
Depends: language-support-translations-bg, language-support-writing-bg
Recommends: language-pack-bg
Description: metapackage for Bulgarian language support
 This metapackage depends on all packages that provide native language support
 for applications. (like spell checkers, dictionaries, OpenOffice and Mozilla
 locale packages, etc.). 
 
 If you also want your applications and the desktop to be translated, please
 additionally install language-pack-bg. 
 
 Language: Bulgarian
/etc/environment

Code:
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
LANGUAGE="bg_BG:bg"
LANG="bg_BG.UTF-8"
/etc/default/locale
Code:
LANG="bg_BG.UTF-8"
LANGUAGE="bg_BG:bg"

All seems right to me so tell me what's wrong.