Add src/middleware.ts

src/middleware.ts

@@ -0,0 +1,12 @@
+import createMiddleware from 'next-intl/middleware';
+import { locales, defaultLocale } from './i18n';
+
+export default createMiddleware({
+  locales,
+  defaultLocale,
+  localePrefix: 'as-needed' 
+});
+
+export const config = {
+  matcher: ['/', '/(fr|de|sv|en)/:path*']
+};