diff --git a/packages/docusaurus/src/commands/build.ts b/packages/docusaurus/src/commands/build.ts
index e1ad88e567..bb1cf4ef43 100644
--- a/packages/docusaurus/src/commands/build.ts
+++ b/packages/docusaurus/src/commands/build.ts
@@ -206,11 +206,7 @@ async function buildLocale({
   await compile([clientConfig, serverConfig]);
 
   // Remove server.bundle.js because it is not needed.
-  if (
-    serverConfig.output &&
-    serverConfig.output.filename &&
-    typeof serverConfig.output.filename === 'string'
-  ) {
+  if (typeof serverConfig.output?.filename === 'string') {
     const serverBundle = path.join(outDir, serverConfig.output.filename);
     if (await fs.pathExists(serverBundle)) {
       await fs.unlink(serverBundle);
diff --git a/packages/docusaurus/src/server/__tests__/i18n.test.ts b/packages/docusaurus/src/server/__tests__/i18n.test.ts
index 5d65a521f8..a78e5fbf3f 100644
--- a/packages/docusaurus/src/server/__tests__/i18n.test.ts
+++ b/packages/docusaurus/src/server/__tests__/i18n.test.ts
@@ -5,12 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import {
-  loadI18n,
-  localizePath,
-  getDefaultLocaleConfig,
-  shouldWarnAboutNodeVersion,
-} from '../i18n';
+import {loadI18n, localizePath, getDefaultLocaleConfig} from '../i18n';
 import {DEFAULT_I18N_CONFIG} from '../configValidation';
 import path from 'path';
 import type {I18nConfig} from '@docusaurus/types';
@@ -83,20 +78,6 @@ describe('defaultLocaleConfig', () => {
   });
 });
 
-describe('shouldWarnAboutNodeVersion', () => {
-  test('warns for old NodeJS version and [en,fr]', () => {
-    expect(shouldWarnAboutNodeVersion(12, ['en', 'fr'])).toEqual(true);
-  });
-
-  test('not warn for old NodeJS version and [en]', () => {
-    expect(shouldWarnAboutNodeVersion(12, ['en'])).toEqual(false);
-  });
-
-  test('not warn for recent NodeJS version and [en,fr]', () => {
-    expect(shouldWarnAboutNodeVersion(14, ['en', 'fr'])).toEqual(false);
-  });
-});
-
 describe('loadI18n', () => {
   const consoleSpy = jest.spyOn(console, 'warn').mockImplementation();
   beforeEach(() => {
@@ -215,7 +196,7 @@ describe('localizePath', () => {
         },
         options: {localizePath: true},
       }),
-    ).toEqual(`${path.sep}baseFsPath${path.sep}fr${path.sep}`);
+    ).toEqual(`${path.sep}baseFsPath${path.sep}fr`);
   });
 
   test('should localize path for default locale, if requested', () => {
diff --git a/packages/docusaurus/src/server/i18n.ts b/packages/docusaurus/src/server/i18n.ts
index 1885b3f47f..26739b4158 100644
--- a/packages/docusaurus/src/server/i18n.ts
+++ b/packages/docusaurus/src/server/i18n.ts
@@ -28,15 +28,6 @@ export function getDefaultLocaleConfig(locale: string): I18nLocaleConfig {
   };
 }
 
-export function shouldWarnAboutNodeVersion(
-  version: number,
-  locales: string[],
-): boolean {
-  const isOnlyEnglish = locales.length === 1 && locales.includes('en');
-  const isOlderNodeVersion = version < 14;
-  return isOlderNodeVersion && !isOnlyEnglish;
-}
-
 export async function loadI18n(
   config: DocusaurusConfig,
   options: {locale?: string} = {},
@@ -86,21 +77,19 @@ export function localizePath({
   options?: {localizePath?: boolean};
 }): string {
   const shouldLocalizePath: boolean =
-    typeof options.localizePath === 'undefined'
-      ? // By default, we don't localize the path of defaultLocale
-        i18n.currentLocale !== i18n.defaultLocale
-      : options.localizePath;
+    // By default, we don't localize the path of defaultLocale
+    options.localizePath ?? i18n.currentLocale !== i18n.defaultLocale;
 
   if (!shouldLocalizePath) {
     return originalPath;
   }
   // FS paths need special care, for Windows support
   if (pathType === 'fs') {
-    return path.join(originalPath, path.sep, i18n.currentLocale, path.sep);
+    return path.join(originalPath, i18n.currentLocale);
   }
-  // Url paths
+  // Url paths; add a trailing slash so it's a valid base URL
   if (pathType === 'url') {
-    return normalizeUrl([originalPath, '/', i18n.currentLocale, '/']);
+    return normalizeUrl([originalPath, i18n.currentLocale, '/']);
   }
   // should never happen
   throw new Error(`Unhandled path type "${pathType}".`);