diff --git a/packages/docusaurus-theme-classic/src/__tests__/__snapshots__/translations.test.ts.snap b/packages/docusaurus-theme-classic/src/__tests__/__snapshots__/translations.test.ts.snap
index d36f4e69596b..b16d98d5a498 100644
--- a/packages/docusaurus-theme-classic/src/__tests__/__snapshots__/translations.test.ts.snap
+++ b/packages/docusaurus-theme-classic/src/__tests__/__snapshots__/translations.test.ts.snap
@@ -16,6 +16,10 @@ exports[`getTranslationFiles returns translation files matching snapshot 1`] = `
         "description": "Navbar item with label Dropdown item 2",
         "message": "Dropdown item 2",
       },
+      "logo.alt": {
+        "description": "The alt of navbar logo",
+        "message": "Navbar alt Logo",
+      },
       "title": {
         "description": "The title in the navbar",
         "message": "navbar title",
@@ -49,6 +53,10 @@ exports[`getTranslationFiles returns translation files matching snapshot 1`] = `
         "description": "The title of the footer links column with title=Footer link column 2 in the footer",
         "message": "Footer link column 2",
       },
+      "logo.alt": {
+        "description": "The alt of footer logo",
+        "message": "Footer alt Logo",
+      },
     },
     "path": "footer",
   },
@@ -71,6 +79,10 @@ exports[`getTranslationFiles returns translation files matching snapshot 2`] = `
         "description": "Navbar item with label Dropdown item 2",
         "message": "Dropdown item 2",
       },
+      "logo.alt": {
+        "description": "The alt of navbar logo",
+        "message": "Navbar alt Logo",
+      },
       "title": {
         "description": "The title in the navbar",
         "message": "navbar title",
@@ -92,6 +104,10 @@ exports[`getTranslationFiles returns translation files matching snapshot 2`] = `
         "description": "The label of footer link with label=Link 2 linking to https://facebook.com",
         "message": "Link 2",
       },
+      "logo.alt": {
+        "description": "The alt of footer logo",
+        "message": "Footer alt Logo",
+      },
     },
     "path": "footer",
   },
@@ -131,6 +147,10 @@ exports[`translateThemeConfig returns translated themeConfig 1`] = `
         "title": "Footer link column 2 (translated)",
       },
     ],
+    "logo": {
+      "alt": "Footer alt Logo",
+      "src": "/img/test_logo.svg",
+    },
     "style": "light",
   },
   "navbar": {
@@ -150,6 +170,10 @@ exports[`translateThemeConfig returns translated themeConfig 1`] = `
         "label": "Dropdown (translated)",
       },
     ],
+    "logo": {
+      "alt": "Navbar alt Logo",
+      "src": "/img/test_logo.svg",
+    },
     "style": "dark",
     "title": "navbar title (translated)",
   },
diff --git a/packages/docusaurus-theme-classic/src/__tests__/translations.test.ts b/packages/docusaurus-theme-classic/src/__tests__/translations.test.ts
index ba4d3464ea35..2abcfa961f77 100644
--- a/packages/docusaurus-theme-classic/src/__tests__/translations.test.ts
+++ b/packages/docusaurus-theme-classic/src/__tests__/translations.test.ts
@@ -18,6 +18,10 @@ const ThemeConfigSample = {
   },
   navbar: {
     title: 'navbar title',
+    logo: {
+      alt: 'Navbar alt Logo',
+      src: '/img/test_logo.svg',
+    },
     style: 'dark',
     hideOnScroll: false,
     items: [
@@ -31,6 +35,10 @@ const ThemeConfigSample = {
     ],
   },
   footer: {
+    logo: {
+      alt: 'Footer alt Logo',
+      src: '/img/test_logo.svg',
+    },
     copyright: 'Copyright FB',
     style: 'light',
     links: [
@@ -52,6 +60,10 @@ const ThemeConfigSample = {
 const ThemeConfigSampleSimpleFooter: ThemeConfig = {
   ...ThemeConfigSample,
   footer: {
+    logo: {
+      alt: 'Footer alt Logo',
+      src: '/img/test_logo.svg',
+    },
     copyright: 'Copyright FB',
     style: 'light',
     links: [
diff --git a/packages/docusaurus-theme-classic/src/translations.ts b/packages/docusaurus-theme-classic/src/translations.ts
index cc087a87d85a..2e9fb5cb3570 100644
--- a/packages/docusaurus-theme-classic/src/translations.ts
+++ b/packages/docusaurus-theme-classic/src/translations.ts
@@ -45,7 +45,20 @@ function getNavbarTranslationFile(navbar: Navbar): TranslationFileContent {
     ? {title: {message: navbar.title, description: 'The title in the navbar'}}
     : {};
 
-  return mergeTranslations([titleTranslations, navbarItemsTranslations]);
+  const logoAlt: TranslationFileContent = navbar.logo?.alt
+    ? {
+        'logo.alt': {
+          message: navbar.logo?.alt,
+          description: 'The alt of navbar logo',
+        },
+      }
+    : {};
+
+  return mergeTranslations([
+    titleTranslations,
+    logoAlt,
+    navbarItemsTranslations,
+  ]);
 }
 function translateNavbar(
   navbar: Navbar,
@@ -119,7 +132,21 @@ function getFooterTranslationFile(footer: Footer): TranslationFileContent {
       }
     : {};
 
-  return mergeTranslations([footerLinkTitles, footerLinkLabels, copyright]);
+  const logoAlt: TranslationFileContent = footer.logo?.alt
+    ? {
+        'logo.alt': {
+          message: footer.logo?.alt,
+          description: 'The alt of footer logo',
+        },
+      }
+    : {};
+
+  return mergeTranslations([
+    footerLinkTitles,
+    footerLinkLabels,
+    copyright,
+    logoAlt,
+  ]);
 }
 function translateFooter(
   footer: Footer,