detectBrowserLanguage does not work in production

[J43fura]

Environment

---

• Operating System: Linux
• Node Version: v20.11.0
• Nuxt Version: 3.11.1
• CLI Version: 3.11.1
• Nitro Version: 2.9.4
• Package Manager: npm@10.5.2
• Builder: -
• User Config: srcDir, imports, $development, app, runtimeConfig, modules, primevue, i18n, postcss, css, supabase
• Runtime Modules: @nuxt/test-utils/module@3.12.0, @nuxtjs/supabase@1.1.7, @nuxtjs/tailwindcss@6.11.4, @pinia/nuxt@0.5.1, nuxt-primevue@0.3.1, @nuxtjs/i18n@8.3.1
• Build Modules: -

---

Reproduction

• The configuration:

  i18n: {
    locales: ['en', 'fr'],
    defaultLocale: 'en',
    strategy: 'no_prefix',
    detectBrowserLanguage: {
      useCookie: true,
      cookieKey: 'i18n_redirected',
      redirectOn: 'root', // recommended
    },
  },

• Run npm run generate

Describe the bug

• Locally in development mode (npm run dev): The cookie is set correctly with the browser locale being its value, works as expected ✔️
• Production (npm run generate): The cookie's value is set to the defaultLocale instead ❌

Additional context

No response

Logs

No response

[github-actions]

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[J43fura]

reproduction: https://stackblitz.com/edit/github-oyrjnm?file=app.vue

[J43fura]

@kazupon here is the reproduction: https://stackblitz.com/edit/github-oyrjnm?file=app.vue

[codeofsumit]

I have the same problem - came here trying to debug this and find a solution. With nuxt generate, cookies and browser language are ignored - it's always the default language (and the cookie value is overwritten to the default language on load)

[BobbieGoede]

This should be resolved by #3087 which is included in the latest patch release so I'll close this, let me know if you have any questions!

[codeofsumit]

I can confirm it works again - thank you for the fix! 🙏