Dear all this issue because windows , you can add language manully in code ,exactly in folder lang :
1) add your langauge folder in lang folder
2) edit installed_languages.inc to add new language as Example :
---------------------
$installed_languages = array (
0 =>
array (
'code' => 'C',
'name' => 'English',
'encoding' => 'iso-8859-1',
),
1 =>
array (
'code' => 'ar_EG',
'name' => 'Arabic',
'package' => 'ar_EG',
'encoding' => 'utf-8',
'version' => '',
'rtl' => 'right-to-left',
'path' => 'install\lang',
),
);
$dflt_lang = 'C';
?>
--------------
the same for modules and so on >>>
I hope i help someone for this issue
