For multi-language versions,
copy /lang/it.php into a new file, for example /lang/en.php.
Translate the terms and load the new file from /core/controller.php.
To do so, change the following line of code
from
include_once(dirname(FILE) . '/../lang/it.php');
to
include_once(dirname(FILE) . '/../lang/en.php');
Many thanks ! Do you think we can configure language in /config.php file ?