hi
i do not know how to explain if it is a bug or a feature request
but i had to edit the language file with every update i wish you can make it permanent from your side with every future release
the translation of the string (due) is incorrect in sales report
following the correct translation:

the file
/app/language/arabic/admin/sma_lang.php

the line
443

old string
$lang['due'] = 'بسبب';

new string
$lang['due'] = 'مستحق';

thanks