diff --git a/README.md b/README.md
index 425793f..aa52ed1 100644
--- a/README.md
+++ b/README.md
@@ -130,8 +130,6 @@ You can do `import { ... } from '@intlify/utils'` the above utilities
 
 ### Navigator
 
-- `getNavigatorLanguages`
-- `getNavigatorLanguage`
 - `getNavigatorLocales`
 - `getNavigatorLocale`
 
diff --git a/src/node.ts b/src/node.ts
index fffc939..361123c 100644
--- a/src/node.ts
+++ b/src/node.ts
@@ -255,7 +255,7 @@ let navigatorLanguages: string[] | undefined
  *
  * @returns {Array<string>} {@link https://datatracker.ietf.org/doc/html/rfc4646#section-2.1 | BCP 47 language tags}, if you can't get the language tag, return an empty array.
  */
-export function getNavigatorLanguages(): readonly string[] {
+function getNavigatorLanguages(): readonly string[] {
   if (navigatorLanguages && navigatorLanguages.length > 0) {
     return navigatorLanguages
   }
@@ -382,7 +382,7 @@ let navigatorLanguage = ''
  *
  * @returns {string} {@link https://datatracker.ietf.org/doc/html/rfc4646#section-2.1 | BCP 47 language tag}, if you can't get the language tag, return a enmpty string.
  */
-export function getNavigatorLanguage(): string {
+function getNavigatorLanguage(): string {
   return navigatorLanguage ||
     (navigatorLanguage = getNavigatorLanguages()[0] || '')
 }
diff --git a/src/web.test.ts b/src/web.test.ts
index 18ad99f..c1e0280 100644
--- a/src/web.test.ts
+++ b/src/web.test.ts
@@ -5,8 +5,6 @@ import {
   getHeaderLanguages,
   getHeaderLocale,
   getHeaderLocales,
-  getNavigatorLanguage,
-  getNavigatorLanguages,
   getNavigatorLocale,
   getNavigatorLocales,
   setCookieLocale,
@@ -224,42 +222,6 @@ describe('setCookieLocale', () => {
   })
 })
 
-describe('getNavigatorLanguages', () => {
-  test('basic', () => {
-    vi.stubGlobal('navigator', {
-      languages: ['en-US', 'en', 'ja'],
-    })
-
-    expect(getNavigatorLanguages()).toEqual(['en-US', 'en', 'ja'])
-  })
-
-  test('error', () => {
-    vi.stubGlobal('navigator', undefined)
-
-    expect(() => getNavigatorLanguages()).toThrowError(
-      /not support `navigator`/,
-    )
-  })
-})
-
-describe('getNavigatorLanguage', () => {
-  test('basic', () => {
-    vi.stubGlobal('navigator', {
-      language: 'en-US',
-    })
-
-    expect(getNavigatorLanguage()).toEqual('en-US')
-  })
-
-  test('error', () => {
-    vi.stubGlobal('navigator', undefined)
-
-    expect(() => getNavigatorLanguage()).toThrowError(
-      /not support `navigator`/,
-    )
-  })
-})
-
 describe('getNavigatorLocales', () => {
   test('basic', () => {
     vi.stubGlobal('navigator', {
@@ -282,7 +244,7 @@ describe('getNavigatorLocales', () => {
   })
 })
 
-describe('getNavigatorLanguage', () => {
+describe('getNavigatorLocale', () => {
   test('basic', () => {
     vi.stubGlobal('navigator', {
       language: 'en-US',
diff --git a/src/web.ts b/src/web.ts
index e4a6bd0..88af0a7 100644
--- a/src/web.ts
+++ b/src/web.ts
@@ -259,7 +259,7 @@ export function setCookieLocale(
  *
  * @returns {Array<string>} {@link https://datatracker.ietf.org/doc/html/rfc4646#section-2.1 | BCP 47 language tags}
  */
-export function getNavigatorLanguages(): readonly string[] {
+function getNavigatorLanguages(): readonly string[] {
   if (typeof navigator === 'undefined') {
     throw new Error('not support `navigator`')
   }
@@ -276,7 +276,7 @@ export function getNavigatorLanguages(): readonly string[] {
  *
  * @returns {string} {@link https://datatracker.ietf.org/doc/html/rfc4646#section-2.1 | BCP 47 language tag}
  */
-export function getNavigatorLanguage(): string {
+function getNavigatorLanguage(): string {
   if (typeof navigator === 'undefined') {
     throw new Error('not support `navigator`')
   }