add lang: nl + deprecate lang/_target

resources/lang/zh_CN/message.php

@@ -51,4 +51,18 @@ BODY,
         'subject' => '考核 :exam_name 结束时间变更',
         'body' => '你进行中的考核：:exam_name 的结束时间由 :old_end_time 变更为 :new_end_time。管理员：:operator，原因：:reason。',
     ],
+
+    'mail_dear' => "尊敬的",
+    'mail_you_received_a_pm' => "你收到了一条新短讯。",
+    'mail_sender' => "发送者	",
+    'mail_subject' => "主题	",
+    'mail_date' => "日期		",
+    'mail_use_following_url' => "你可以点击",
+    'mail_use_following_url_1' => "来查看该短讯（你可能需要登录）",
+    'mail_yours' => "",
+    'mail_the_site_team' => "%s网站",
+    'mail_received_pm_from' => "你有新短讯，来自",
+    'mail_here' => "这里",
+    'msg_system' => "系统",
+    'msg_original_message_from' => "原短讯来自",
 ];