create i18n

resource/locales/en_US/admin/admin.json

@@ -258,6 +258,7 @@
     "invite_modal": {
       "emails": "Emails (Possible to invite multiple people with new lines)",
       "invite_thru_email": "Send invitation email",
+      "mailer_setup_required":"<a href='/admin/app'>Email settings</a> are required to send.",
       "valid_email": "Valid email address is required",
       "temporary_password": "The created user has a temporary password",
       "send_new_password": "Please send the new password to the user.",

resource/locales/ja_JP/admin/admin.json

@@ -256,6 +256,7 @@
     "invite_modal": {
       "emails": "メールアドレス (複数行入力で複数人招待可能)",
       "invite_thru_email": "招待をメールで送信",
+      "mailer_setup_required":"送信するには <a href='/admin/app'>メールの設定</a> が必要です。",
       "valid_email": "メールアドレスを入力してください。",
       "temporary_password": "作成したユーザーは仮パスワードが設定されています。",
       "send_new_password": "新規発行したパスワードを、対象ユーザーへ連絡してください。",

resource/locales/zh_CN/admin/admin.json

@@ -266,6 +266,7 @@
 		"invite_modal": {
 			"emails": "电子邮件",
 			"invite_thru_email": "发送邀请电子邮件",
+      "mailer_setup_required":"<a href='/admin/app'>Email settings</a> are required to send.",
 			"valid_email": "需要有效的电子邮件地址",
 			"temporary_password": "创建的用户具有临时密码",
 			"send_new_password": "请将新密码发送给用户。",