diff --git a/src/i18n/i18n.config.ts b/src/i18n/i18n.config.ts
index d36942ba..5b98c900 100644
--- a/src/i18n/i18n.config.ts
+++ b/src/i18n/i18n.config.ts
@@ -17,6 +17,11 @@ import id from './locales/id.json';
 export default defineI18nConfig(() => ({
   legacy: false,
   fallbackLocale: 'en',
+  // Disable strict mode to prevent deepCopy errors with locale merging
+  silentTranslationWarn: true,
+  silentFallbackWarn: true,
+  // Use shallow merging to avoid deepCopy issues
+  mergeFallbackMessage: true,
   messages: {
     en,
     pl,
diff --git a/src/nuxt.config.ts b/src/nuxt.config.ts
index 87adfe60..e061459b 100644
--- a/src/nuxt.config.ts
+++ b/src/nuxt.config.ts
@@ -23,9 +23,10 @@ export default defineNuxtConfig({
   },
   i18n: {
     // https://i18n.nuxtjs.org/docs/guide/server-side-translations
-    experimental: {
-      localeDetector: './localeDetector.ts',
-    },
+    // Disabled experimental locale detector to prevent deepCopy errors
+    // experimental: {
+    //   localeDetector: './localeDetector.ts',
+    // },
     // https://wg-easy.github.io/wg-easy/latest/contributing/translation/
     locales: [
       {
@@ -109,7 +110,12 @@ export default defineNuxtConfig({
     strategy: 'no_prefix',
     detectBrowserLanguage: {
       useCookie: true,
+      fallbackLocale: 'en',
+      // Disable redirect to prevent locale switching during SSR
+      redirectOn: 'root',
     },
+    // Disable lazy loading to prevent runtime locale merging issues
+    lazy: false,
   },
   nitro: {
     esbuild: {