How to add new language .
1) Open "lang" folder . You will find the list of files . By default we have 2 files "english.php" and "russian.php".
2) Create a copy of "english.php" file and rename it to your language . Example :
3) Open new created file , and translate all it's content .
4) Now , add it to config.php file .
The list of all flags you can find in "img/flags" folder.
Now , a new added language will be available in interface.