i18n for label

resource/locales/en_US/admin/admin.json

@@ -29,6 +29,8 @@
     "mail_settings": "E-mail Settings",
     "from_e-mail_address": "From e-mail address",
     "transmission_method":"Transmission Method",
+    "smtp_label":"SMTP",
+    "ses_label":"SES(AWS)",
     "smtp_settings": "SMTP settings",
     "host": "Host",
     "port": "Port",

resource/locales/ja_JP/admin/admin.json

@@ -29,6 +29,8 @@
     "mail_settings": "メールの設定",
     "from_e-mail_address": "Fromアドレス",
     "transmission_method":"送信方法",
+    "smtp_label":"SMTP",
+    "ses_label":"SES(AWS)",
     "smtp_settings": "SMTP設定",
     "host": "ホスト",
     "port": "ポート",

resource/locales/zh_CN/admin/admin.json

@@ -29,6 +29,8 @@
 		"mail_settings": "邮件设置",
     "from_e-mail_address": "From e-mail address",
     "transmission_method":"Transmission Method",
+    "smtp_label":"SMTP",
+    "ses_label":"SES(AWS)",
 		"smtp_settings": "SMTP 设置",
 		"host": "服务器",
 		"port": "端口号",

src/client/js/components/Admin/App/MailSetting.jsx

@@ -60,7 +60,7 @@ function MailSetting(props) {
                     adminAppContainer.changeTransmissionMethod(method);
                   }}
                   />
-                  <label className="custom-control-label" htmlFor={`transmission-nethod-radio-${method}`}>{method}</label>
+                  <label className="custom-control-label" htmlFor={`transmission-nethod-radio-${method}`}>{t(`admin:app_setting.${method}_label`)}</label>
                 </div>
               );
             })}