diff --git a/packages/client/src/resolvers.ts b/packages/client/src/resolvers.ts
index 67d4012673..b9d64798ab 100644
--- a/packages/client/src/resolvers.ts
+++ b/packages/client/src/resolvers.ts
@@ -103,15 +103,15 @@ export const resolvers = reactive({
    * It would merge the locales fields to the root fields
    */
   resolveSiteLocaleData: (
-    siteData: SiteData,
+    { base, locales, ...siteData }: SiteData,
     routeLocale: RouteLocale,
   ): SiteLocaleData => ({
     ...siteData,
-    ...siteData.locales[routeLocale],
+    ...locales[routeLocale],
     head: [
       // when merging head, the locales head should be placed before root head
       // to get higher priority
-      ...(siteData.locales[routeLocale]?.head ?? []),
+      ...(locales[routeLocale]?.head ?? []),
       ...(siteData.head ?? []),
     ],
   }),
diff --git a/packages/client/src/types/clientData.ts b/packages/client/src/types/clientData.ts
index 6901a85b6a..d5af2c224f 100644
--- a/packages/client/src/types/clientData.ts
+++ b/packages/client/src/types/clientData.ts
@@ -4,6 +4,7 @@ import type {
   PageFrontmatter,
   PageHeader,
   SiteData,
+  SiteLocaleData,
 } from '@vuepress/shared'
 import type { Component, ComputedRef, Ref } from 'vue'
 import type {
@@ -12,7 +13,14 @@ import type {
 } from '../constants.js'
 import type { Redirects, Routes } from './routes.js'
 
-export type { HeadConfig, PageData, PageFrontmatter, PageHeader, SiteData }
+export type {
+  HeadConfig,
+  PageData,
+  PageFrontmatter,
+  PageHeader,
+  SiteData,
+  SiteLocaleData,
+}
 
 export interface Layouts {
   [LAYOUT_NAME_DEFAULT]: Component
@@ -26,7 +34,6 @@ export type PageLang = string
 export type PageLayout = Component
 export type RoutePath = string
 export type RouteLocale = string
-export type SiteLocaleData = SiteData
 
 export type LayoutsRef = ComputedRef<Layouts>
 export type PageComponentRef = ComputedRef<PageComponent>