diff --git a/app/javascript/dashboard/i18n/locale/ja/helpCenter.json b/app/javascript/dashboard/i18n/locale/ja/helpCenter.json
index 0ef035f64..0bf000bc3 100644
--- a/app/javascript/dashboard/i18n/locale/ja/helpCenter.json
+++ b/app/javascript/dashboard/i18n/locale/ja/helpCenter.json
@@ -700,9 +700,27 @@
           "MAKE_DEFAULT": "デフォルトに設定",
           "MOVE_TO_DRAFT": "Move to draft",
           "PUBLISH_LOCALE": "Publish locale",
+          "CUSTOMIZE_CONTENT": "Localize content",
           "DELETE": "削除"
         }
       },
+      "CONTENT_DIALOG": {
+        "TITLE": "Localize content",
+        "DESCRIPTION": "Set values specific to this locale. Anything left blank falls back to the default locale.",
+        "NAME": {
+          "LABEL": "名前"
+        },
+        "PAGE_TITLE": {
+          "LABEL": "ページタイトル"
+        },
+        "HEADER_TEXT": {
+          "LABEL": "ヘッダーテキスト"
+        },
+        "API": {
+          "SUCCESS_MESSAGE": "Locale content updated successfully",
+          "ERROR_MESSAGE": "Unable to update locale content. Try again."
+        }
+      },
       "ADD_LOCALE_DIALOG": {
         "TITLE": "新しいロケールを追加",
         "DESCRIPTION": "この記事が書かれる言語を選択します。これが翻訳リストに追加され、後でさらに追加できます。",