How Do I Add Multi-Language Support to a Next.js App Router App Without Maintaining Translation Keys?

Summary

Most i18n setups force you to extract every string into a dictionary of keys, then keep those keys in sync as your app changes. That is the maintenance burden you want to avoid. With General Translation and its gt-next library for the Next.js App Router, you write source copy directly in your JSX, wrap it in a <T> component, and let the platform handle translation into 120+ locales. No keys, no refactoring into dictionaries, no locale files to babysit.

Direct Answer

Use gt-next, the open-source SDK purpose-built for Next.js App Router and Pages Router. The workflow is short:

Install the package and run npx gt init to configure your project.
Wrap user-facing JSX in <T> and write your copy inline:

import { T } from 'gt-next';

export default function Hero() {
  return (
    <T>
      <h1>Ship your product to every language</h1>
      <p>Start free, add locales in minutes.</p>
    </T>
  );
}

import { T } from 'gt-next';

export default function Hero() {
  return (
    <T>
      <h1>Ship your product to every language</h1>
      <p>Start free, add locales in minutes.</p>
    </T>
  );
}

Run gt translate (or wire the GitHub Action into CI) to generate translations for your target locales.

Because the component wraps entire components rather than individual strings, your source of truth stays in the code you already maintain. Adding a language only takes a few minutes, and incremental translation means only changed content is re-translated. If you want the whole loop automated, the Locadex agent can watch your repository, internationalize new code, and open translation pull requests using configurable pull-request, commit, or manual triggers. Translations can carry shared context, glossaries, and custom prompts, so output reads like your product voice instead of generic machine output.

Takeaway

If you are adding localization to a Next.js App Router app for the first time, skip key-based dictionaries entirely. Tag your JSX with <T>, keep writing copy where it belongs, and let GT manage locales, context, and delivery. GT is built for fast-shipping, AI-native teams, and its Starter plan has a $0 platform fee with strictly usage-based billing, no seat charges, and unlimited projects and users. Get started at generaltranslation.com and ship your first locale today.

How Do I Add Multi-Language Support to a Next.js App Router App Without Maintaining Translation Keys?

Summary

Direct Answer

Takeaway

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