docs: add English translate

docs/en/reference/default-theme-search.md

@@ -43,7 +43,7 @@ export default defineConfig({
       provider: 'local',
       options: {
         locales: {
-          zh: { // make this `root` if you want to translate the default locale
+          zh: {
             translations: {
               button: {
                 buttonText: '搜索',
@@ -73,6 +73,43 @@ export default defineConfig({
 })
 ```
 
+If you only want to translate the default language, you can configure it like this:
+
+```ts
+import { defineConfig } from 'vitepress'
+
+export default defineConfig({
+  themeConfig: {
+    search: {
+      provider: 'local',
+      options: {
+        translations: {
+          button: {
+            buttonText: '搜索',
+            buttonAriaLabel: '搜索'
+          },
+          modal: {
+            displayDetails: '显示详细列表',
+            resetButtonTitle: '重置搜索',
+            backButtonTitle: '关闭搜索',
+            noResultsText: '没有结果',
+            footer: {
+              selectText: '选择',
+              selectKeyAriaLabel: '输入',
+              navigateText: '导航',
+              navigateUpKeyAriaLabel: '上箭头',
+              navigateDownKeyAriaLabel: '下箭头',
+              closeText: '关闭',
+              closeKeyAriaLabel: 'esc'
+            }
+          }
+        }
+      }
+    }
+  }
+})
+```
+
 ### miniSearch options
 
 You can configure MiniSearch like this: