i18n

resource/locales/en-US/translation.json

@@ -700,7 +700,8 @@
     "cannot_remove":"You cannot remove yourself from administrator",
     "cannot_invite_maximum_users": "Can not invite more than the maximum number of users.",
     "current_users": "Current users:",
-    "valid_email": "Valid email address is required"
+    "valid_email": "Valid email address is required",
+    "existing_email": "The following emails already exist"
   },
 
   "user_group_management": {

resource/locales/ja/translation.json

@@ -684,7 +684,8 @@
     "cannot_remove": "自分自身を管理者から外すことはできません",
     "cannot_invite_maximum_users": "ユーザーが上限に達したため招待できません。",
     "current_users": "現在のユーザー数：",
-    "valid_email": "メールアドレスを入力してください。"
+    "valid_email": "メールアドレスを入力してください。",
+    "existing_email": "以下のEmailはすでに存在しています。"
   },
 
   "user_group_management": {

src/client/js/components/Admin/Users/ConfirmationPasswordModal.jsx

@@ -23,9 +23,11 @@ class ConfirmationPasswordModal extends React.Component {
   }
 
   renderExistingEmail(emailList) {
+    const { t } = this.props;
+
     return (
       <>
-        <p className="text-warning">以下のEmailはすでに存在しています</p>
+        <p className="text-warning">{ t('user_management.existing_email') }</p>
         <ul>
           {emailList.map((user) => {
             return (