diff --git a/src/config.ts b/src/config.ts
index b74d97c..c16b25c 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -111,6 +111,7 @@ export const defaults: ModuleOptions = {
   include: defaultInclude,
   exclude: defaultExclude,
   namespace: 'el',
+  defaultLocale: 'en',
   appendTo: [],
   installMethods: [],
   icon: 'ElIcon'
diff --git a/src/core/cache.ts b/src/core/cache.ts
index a5a7588..10f929e 100644
--- a/src/core/cache.ts
+++ b/src/core/cache.ts
@@ -4,13 +4,13 @@ import { camelize } from '../utils'
 
 export function resolveCache (config: ModuleOptions) {
   const { defaultLocale } = config
-  const locale = camelize(defaultLocale ?? '')
+  const locale = camelize(defaultLocale)
 
   return {
     filename: `${libraryName}-cache.mjs`,
     getContents: () => {
       return `export * from '${libraryName}';
-${defaultLocale
+${defaultLocale !== 'en'
   ? `import ${locale} from '${libraryName}/es/locale/lang/${defaultLocale}.mjs';
 export { ${locale} };`
   : ''}`
diff --git a/src/core/globalConfig.ts b/src/core/globalConfig.ts
index b9d3e55..d5863b9 100644
--- a/src/core/globalConfig.ts
+++ b/src/core/globalConfig.ts
@@ -4,8 +4,8 @@ import { camelize, resolveComponentPath } from '../utils'
 
 export function resolveGlobalConfig (config: ModuleOptions) {
   const { globalConfig, cache, defaultLocale } = config
-  const needLocale = !!(cache && defaultLocale)
-  const locale = camelize(defaultLocale ?? '')
+  const needLocale = !!(cache && defaultLocale !== 'en')
+  const locale = camelize(defaultLocale)
   let provideConfig = JSON.stringify(globalConfig)
 
   if (needLocale) {
diff --git a/src/module.ts b/src/module.ts
index 1dab850..8a59c66 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -65,7 +65,7 @@ export default defineNuxtModule<ModuleOptions>({
         transformDirectives: name => resolveDirectives(options, name)
       }))
 
-      if (options.defaultLocale && options.defaultLocale !== 'en') {
+      if (options.defaultLocale !== 'en') {
         config.plugins.push(localePlugin.vite({
           sourcemap: nuxt.options.sourcemap[mode],
           locale: options.defaultLocale
@@ -88,7 +88,7 @@ export default defineNuxtModule<ModuleOptions>({
           transformDirectives: name => resolveDirectives(options, name)
         }))
 
-        if (options.defaultLocale && options.defaultLocale !== 'en') {
+        if (options.defaultLocale !== 'en') {
           config.plugins.push(localePlugin.webpack({
             sourcemap: nuxt.options.sourcemap[mode],
             locale: options.defaultLocale
diff --git a/src/types.ts b/src/types.ts
index 1de0e4a..c680f49 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -163,7 +163,7 @@ export interface ModuleOptions extends TransformOptions {
    * @default 'en'
    * @example 'zh-cn'
    */
-  defaultLocale?: string
+  defaultLocale: string
   /**
    * Set global configuration, such as modifying the default size and z-index of the component.
    *