diff --git a/Resource/locale/messages.en.yaml b/Resource/locale/messages.en.yaml
index ea95947..c810d7f 100644
--- a/Resource/locale/messages.en.yaml
+++ b/Resource/locale/messages.en.yaml
@@ -27,6 +27,12 @@ api:
       'scope.mcp:order:read.description': 'Read %shop_name% order data'
       'scope.mcp:customer:read.description': 'Read %shop_name% customer data'
       'scope.mcp:plugin:read.description': 'Read %shop_name% plugin information'
+      'scope.acp:checkout.description': 'Check out at %shop_name% (create, update and complete orders)'
+      'scope.acp:catalog.description': 'Read %shop_name% catalog data'
+      'scope.ucp:checkout.description': 'Check out at %shop_name% (create, update and complete orders)'
+      'scope.ucp:cart.description': 'Operate your %shop_name% cart (add, change and remove items)'
+      'scope.ucp:catalog.description': 'Read %shop_name% catalog data'
+      'scope.ucp:identity.description': 'Link your %shop_name% member ID (identify you as a member)'
       redirect_uri: Redirect URI
       redirect_uri_tooltip: You can enter multiple URIs separated by commas
       grant_type: Grant Type
diff --git a/Resource/locale/messages.ja.yaml b/Resource/locale/messages.ja.yaml
index 32dac2f..4fdfee3 100644
--- a/Resource/locale/messages.ja.yaml
+++ b/Resource/locale/messages.ja.yaml
@@ -27,6 +27,12 @@ api:
       'scope.mcp:order:read.description': '%shop_name%の注文データの読み取り'
       'scope.mcp:customer:read.description': '%shop_name%の顧客会員データの読み取り'
       'scope.mcp:plugin:read.description': '%shop_name%のプラグイン情報の読み取り'
+      'scope.acp:checkout.description': '%shop_name%でのチェックアウト（注文の作成・更新・確定）'
+      'scope.acp:catalog.description': '%shop_name%のカタログデータの読み取り'
+      'scope.ucp:checkout.description': '%shop_name%でのチェックアウト（注文の作成・更新・確定）'
+      'scope.ucp:cart.description': '%shop_name%のカートの操作（商品の追加・変更・削除）'
+      'scope.ucp:catalog.description': '%shop_name%のカタログデータの読み取り'
+      'scope.ucp:identity.description': '%shop_name%の会員IDとの連携（会員としての本人確認）'
       redirect_uri: リダイレクトURI
       redirect_uri_tooltip: カンマ区切りで複数のURIを入力可能
       grant_type: グラントタイプ
diff --git a/Tests/Resource/ScopeTranslationTest.php b/Tests/Resource/ScopeTranslationTest.php
new file mode 100644
index 0000000..3752906
--- /dev/null
+++ b/Tests/Resource/ScopeTranslationTest.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of EC-CUBE
+ *
+ * Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved.
+ *
+ * http://www.ec-cube.co.jp/
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Plugin\Api44\Tests\Resource;
+
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Yaml\Yaml;
+
+/**
+ * 権限移譲確認画面 (`admin/OAuth/authorization.twig`) は要求された scope を
+ * `api.admin.oauth.scope.<scope>.description` で表示する。 翻訳が無い scope は
+ * 翻訳キーがそのまま画面に出るため、 `scopes.available` との同期をテストで担保する。
+ */
+final class ScopeTranslationTest extends TestCase
+{
+    #[DataProvider('localeProvider')]
+    public function testAllAvailableScopesHaveDescription(string $locale): void
+    {
+        $messages = Yaml::parseFile(__DIR__.'/../../Resource/locale/messages.'.$locale.'.yaml');
+        $oauth = $messages['api']['admin']['oauth'];
+
+        foreach (self::availableScopes() as $scope) {
+            $key = 'scope.'.$scope.'.description';
+            self::assertArrayHasKey(
+                $key,
+                $oauth,
+                sprintf('scope `%s` の説明が messages.%s.yaml に定義されていない', $scope, $locale)
+            );
+            self::assertNotSame('', trim((string) $oauth[$key]));
+        }
+    }
+
+    /**
+     * @return string[][]
+     */
+    public static function localeProvider(): array
+    {
+        return [['ja'], ['en']];
+    }
+
+    /**
+     * @return list<string>
+     */
+    private static function availableScopes(): array
+    {
+        $config = Yaml::parseFile(__DIR__.'/../../Resource/config/services.yaml');
+
+        return $config['league_oauth2_server']['scopes']['available'];
+    }
+}