This patch is contributed by Marijuana:
The patch contains Smarty and PHPMailer. Testers --- GIJOE, gigamaster, tohokuaiki and gusagi --- tried to test and did not encouter any troubles. But, those 3rd libraries have some diffs:
1. X2 Smarty uses 'core' directory. But, the latest Smarty uses 'internals'.
2. A Japanese message catalog of the latest PHPMailer is EUC-JP. To use UTF-8, we re-encode the catalog.
Perhaps, this is not only Japanese problem.