PrestaShop/PrestaShop — pull request #1044 by prestamodule (2013-11-26 11:00:25+00:00)
Title: Mail translation methods fix & template translation fix 

Mail class and l method :

If id_lang are mixed (1, 2, 3, 1, 4, 2...) the translations aren't correctly populated from the theme lang.php override if include_once is used. include must be used in order to handle mixed id_lang in a same process.