$mail_subject and $mail_message to language file?

Should $mail_subject and $mail_message be in the language file for the following files?

functions.php:
$mail_subject = 'Alert - New registration';
$mail_message = 'User \''.$user_info['username'].'\' registered in the forums at '.$base_url.'/'."\n\n".'User profile: '.pun_link($pun_url['user'], $new_uid)."\n\n".'-- '."\n".'Forum Mailer'."\n".'(Do not reply to this message)';

register.php:
$mail_subject = 'Alert - Banned e-mail detected';
$mail_message = 'User \''.$username.'\' registered with banned e-mail address: '.$email1."\n\n".'User profile: '.pun_link($pun_url['user'], $new_uid)."\n\n".'-- '."\n".'Forum Mailer'."\n".'(Do not reply to this message)';

$mail_subject = 'Alert - Duplicate e-mail detected';
$mail_message = 'User \''.$username.'\' registered with an e-mail address that also belongs to: '.implode(', ', $dupe_list)."\n\n".'User profile: '.pun_link($pun_url['user'], $new_uid)."\n\n".'-- '."\n".'Forum Mailer'."\n".'(Do not reply to this message)';

misc.php:
$mail_subject = 'Report('.$forum_id.') - \''.$subject.'\'';
$mail_message = 'User \''.$pun_user['username'].'\' has reported the following message:'."\n".pun_link($pun_url['post'], $post_id)."\n\n".'Reason:'."\n".$reason;

profile.php:
$mail_subject = 'Alert - Banned e-mail detected';
$mail_message = 'User \''.$pun_user['username'].'\' changed to banned e-mail address: '.$new_email."\n\n".'User profile: '.pun_link($pun_url['user'], $id)."\n\n".'-- '."\n".'Forum Mailer'."\n".'(Do not reply to this message)';

$mail_subject = 'Alert - Duplicate e-mail detected';
$mail_message = 'User \''.$pun_user['username'].'\' changed to an e-mail address that also belongs to: '.implode(', ', $dupe_list)."\n\n".'User profile: '.pun_link($pun_url['user'], $id)."\n\n".'-- '."\n".'Forum Mailer'."\n".'(Do not reply to this message)';