diff --git a/jest.config.mjs b/jest.config.mjs
index ca2be525b050..3d6ac4dfca18 100644
--- a/jest.config.mjs
+++ b/jest.config.mjs
@@ -34,7 +34,7 @@ export default {
   verbose: true,
   // Default 5s timeout often fails on Windows :s,
   // see https://github.com/facebook/docusaurus/pull/8259
-  testTimeout: 15000,
+  testTimeout: 25000,
   setupFiles: ['./jest/setup.ts'],
   testEnvironmentOptions: {
     url: 'https://docusaurus.io/',
diff --git a/packages/docusaurus-plugin-content-docs/src/__tests__/__snapshots__/translations.test.ts.snap b/packages/docusaurus-plugin-content-docs/src/__tests__/__snapshots__/translations.test.ts.snap
index 82dedb7cbeb0..8d5f668a1b26 100644
--- a/packages/docusaurus-plugin-content-docs/src/__tests__/__snapshots__/translations.test.ts.snap
+++ b/packages/docusaurus-plugin-content-docs/src/__tests__/__snapshots__/translations.test.ts.snap
@@ -24,6 +24,18 @@ exports[`getLoadedContentTranslationFiles returns translation files 1`] = `
         "description": "The label for link 'Link label' in sidebar 'docs', linking to 'https://facebook.com'",
         "message": "Link label",
       },
+      "sidebar.otherSidebar.category.cat-with-key": {
+        "description": "The label for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.description": {
+        "description": "The generated-index page description for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index description",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.title": {
+        "description": "The generated-index page title for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index title",
+      },
       "sidebar.otherSidebar.doc.Fifth doc translatable": {
         "description": "The label for the doc item 'Fifth doc translatable' in sidebar 'otherSidebar', linking to the doc doc5",
         "message": "Fifth doc translatable",
@@ -57,6 +69,18 @@ exports[`getLoadedContentTranslationFiles returns translation files 1`] = `
         "description": "The label for link 'Link label' in sidebar 'docs', linking to 'https://facebook.com'",
         "message": "Link label",
       },
+      "sidebar.otherSidebar.category.cat-with-key": {
+        "description": "The label for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.description": {
+        "description": "The generated-index page description for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index description",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.title": {
+        "description": "The generated-index page title for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index title",
+      },
       "sidebar.otherSidebar.doc.Fifth doc translatable": {
         "description": "The label for the doc item 'Fifth doc translatable' in sidebar 'otherSidebar', linking to the doc doc5",
         "message": "Fifth doc translatable",
@@ -90,6 +114,18 @@ exports[`getLoadedContentTranslationFiles returns translation files 1`] = `
         "description": "The label for link 'Link label' in sidebar 'docs', linking to 'https://facebook.com'",
         "message": "Link label",
       },
+      "sidebar.otherSidebar.category.cat-with-key": {
+        "description": "The label for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.description": {
+        "description": "The generated-index page description for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index description",
+      },
+      "sidebar.otherSidebar.category.cat-with-key.link.generated-index.title": {
+        "description": "The generated-index page title for category 'Category with key' in sidebar 'otherSidebar'",
+        "message": "Category with key - index title",
+      },
       "sidebar.otherSidebar.doc.Fifth doc translatable": {
         "description": "The label for the doc item 'Fifth doc translatable' in sidebar 'otherSidebar', linking to the doc doc5",
         "message": "Fifth doc translatable",
@@ -273,6 +309,21 @@ exports[`translateLoadedContent returns translated loaded content 1`] = `
             "translatable": true,
             "type": "ref",
           },
+          {
+            "collapsed": false,
+            "collapsible": true,
+            "items": [],
+            "key": "cat-with-key",
+            "label": "Category with key (translated)",
+            "link": {
+              "description": "Category with key - index description (translated)",
+              "permalink": "/docs/category/cat-with-key",
+              "slug": "/category/cat-with-key-slug",
+              "title": "Category with key - index title (translated)",
+              "type": "generated-index",
+            },
+            "type": "category",
+          },
         ],
       },
       "tagsPath": "/tags/",
@@ -444,6 +495,21 @@ exports[`translateLoadedContent returns translated loaded content 1`] = `
             "translatable": true,
             "type": "ref",
           },
+          {
+            "collapsed": false,
+            "collapsible": true,
+            "items": [],
+            "key": "cat-with-key",
+            "label": "Category with key (translated)",
+            "link": {
+              "description": "Category with key - index description (translated)",
+              "permalink": "/docs/category/cat-with-key",
+              "slug": "/category/cat-with-key-slug",
+              "title": "Category with key - index title (translated)",
+              "type": "generated-index",
+            },
+            "type": "category",
+          },
         ],
       },
       "tagsPath": "/tags/",
@@ -615,6 +681,21 @@ exports[`translateLoadedContent returns translated loaded content 1`] = `
             "translatable": true,
             "type": "ref",
           },
+          {
+            "collapsed": false,
+            "collapsible": true,
+            "items": [],
+            "key": "cat-with-key",
+            "label": "Category with key (translated)",
+            "link": {
+              "description": "Category with key - index description (translated)",
+              "permalink": "/docs/category/cat-with-key",
+              "slug": "/category/cat-with-key-slug",
+              "title": "Category with key - index title (translated)",
+              "type": "generated-index",
+            },
+            "type": "category",
+          },
         ],
       },
       "tagsPath": "/tags/",
diff --git a/packages/docusaurus-plugin-content-docs/src/__tests__/translations.test.ts b/packages/docusaurus-plugin-content-docs/src/__tests__/translations.test.ts
index 26666037c589..87485078fad5 100644
--- a/packages/docusaurus-plugin-content-docs/src/__tests__/translations.test.ts
+++ b/packages/docusaurus-plugin-content-docs/src/__tests__/translations.test.ts
@@ -116,6 +116,21 @@ function createSampleVersion(
           label: 'Fifth doc translatable',
           translatable: true,
         },
+        {
+          type: 'category',
+          key: 'cat-with-key',
+          label: 'Category with key',
+          collapsed: false,
+          collapsible: true,
+          link: {
+            type: 'generated-index',
+            slug: '/category/cat-with-key-slug',
+            permalink: '/docs/category/cat-with-key',
+            title: 'Category with key - index title',
+            description: 'Category with key - index description',
+          },
+          items: [],
+        },
       ],
     },
     ...version,
diff --git a/packages/docusaurus-plugin-content-docs/src/translations.ts b/packages/docusaurus-plugin-content-docs/src/translations.ts
index 9ad1a148b039..ecea3252d438 100644
--- a/packages/docusaurus-plugin-content-docs/src/translations.ts
+++ b/packages/docusaurus-plugin-content-docs/src/translations.ts
@@ -177,13 +177,14 @@ function translateSidebar({
       return undefined;
     }
     if (category.link.type === 'generated-index') {
+      const categoryKey = category.key ?? category.label;
       const title =
         sidebarsTranslations[
-          `sidebar.${sidebarName}.category.${category.label}.link.generated-index.title`
+          `sidebar.${sidebarName}.category.${categoryKey}.link.generated-index.title`
         ]?.message ?? category.link.title;
       const description =
         sidebarsTranslations[
-          `sidebar.${sidebarName}.category.${category.label}.link.generated-index.description`
+          `sidebar.${sidebarName}.category.${categoryKey}.link.generated-index.description`
         ]?.message ?? category.link.description;
       return {
         ...category.link,