diff --git a/src/index.ts b/src/index.ts
index cf8595b..4b12caf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -83,7 +83,8 @@ function nextTranslate(nextConfig: NextConfig = {}): NextConfig {
   }
 
   return {
-    ...nextConfigWithI18n,
+    // new next with app folder cannot have i18n config in next.config.js
+    ...(existPagesFolder ? nextConfigWithI18n : nextConfig),
     webpack(conf: webpack.Configuration, options) {
       const config: webpack.Configuration =
         typeof nextConfig.webpack === 'function'