Internationalize Your Next.js Site Instantly with SiteLocaleAI

No routing overhaul, no extra build steps – just a drop‑in script that makes your site multilingual and SEO‑ready.

Why Internationalization Matters for SEO

Search engines treat each language version of a page as a separate entity. Properly indexed translations boost organic traffic, improve dwell time, and help you rank for local queries. Traditional Next.js i18n requires you to pre‑define locales in next.config.js and often duplicate routes, which can be a maintenance nightmare.

SiteLocaleAI solves this by localising the page on the fly using your own LLM API key (Claude, GPT‑4o‑mini, etc.) and pre‑rendering the translated HTML for crawlers via a simple CLI. You keep your existing routing, and the library handles language detection, price rounding, and SEO meta tags automatically.

---

1️⃣ Install the Library

npm i @sitelocaleai/js
# or with Yarn
yarn add @sitelocaleai/js

The package works with any framework (React, Vue, WordPress, Shopify) because it injects a client‑side script that runs after the page loads.

---

2️⃣ Add the Drop‑In Script

Create a file public/site-locale.js (or import directly from the package) and initialise it with your LLM key:

// public/site-locale.js
import { initSiteLocale } from '@sitelocaleai/js';

initSiteLocale({
  apiKey: process.env.NEXT_PUBLIC_LOCALEAI_API_KEY, // e.g. Claude or GPT‑4o‑mini
  defaultLang: 'en',
  supportedLangs: ['en', 'es', 'fr', 'de', 'ja'],
  priceRounding: true,
  // Optional: custom domain mapping for hreflang
  domainMap: {
    en: 'example.com',
    es: 'example.es',
    fr: 'example.fr',
    de: 'example.de',
    ja: 'example.jp'
  }
});

Then load the script in _app.js (or your root layout) after the main bundle:

// pages/_app.js
import '../styles/globals.css';

function MyApp({ Component, pageProps }) {
  return (
    <>
      <Component {...pageProps} />
      <script src="/site-locale.js" defer></script>
    </>
  );
}

export default MyApp;

That’s it – the library will:

• Detect the visitor’s locale via Accept‑Language header or URL query.
• Translate visible text nodes using your LLM.
• Replace prices with psychologically rounded values (e.g., $9.99 → $10).
• Inject hreflang tags for each supported language.

---

3️⃣ SEO Pre‑Rendering with the CLI

Search engines don’t execute JavaScript the same way browsers do. To give them a fully translated HTML snapshot, run the SiteLocaleAI CLI during your build step:

npx @sitelocaleai/cli pre-render \
  --output ./out \
  --locales en,es,fr,de,ja \
  --api-key $LOCALEAI_API_KEY

The CLI:

1. Crawls your site (starting at /).
2. Renders each page in every locale using a headless browser.
3. Saves static HTML files under ./out/<locale>/.

Deploy the out folder to your hosting platform (Vercel, Netlify, etc.). Search engines will now index the translated pages directly, while regular visitors still get the dynamic, on‑the‑fly experience.

---

4️⃣ Price Localization & Psychological Rounding

If you sell products, you probably already have a price field in USD. SiteLocaleAI can convert and round it per currency:

// Example component
function Price({ amountUSD }) {
  const { localizedPrice } = useSiteLocale(); // hook provided by the lib
  return <span>{localizedPrice(amountUSD)}</span>;
}

The rounding logic follows market‑tested heuristics (e.g., €9.95 → €10, ¥1,200 → ¥1,199) to increase conversion rates.

---

5️⃣ WordPress Integration (No Node Required)

If part have a WordPress front‑end that also serves a Next.js front‑end, you can install the SiteLocaleAI WordPress plugin. It injects the same script via a shortcode, so you don’t need any Node tooling on the WP side.

// In your theme’s header.php
<?php echo do_shortcode('[sitelocaleai]'); ?>

The plugin reads the same environment variables you set in .env and works out‑of‑the‑box.

---

6️⃣ Best Practices for International SEO

✅	Recommendation
1	Use hreflang tags (SiteLocaleAI adds them automatically).
2	Provide a language‑specific canonical URL to avoid duplicate content.
3	Translate meta titles & descriptions – the library can do this via a custom hook.
4	Keep URL structures clean – let the CLI generate /es/about.html instead of query strings.
5	Test with Google Search Console’s URL Inspection tool for each locale.

---

7️⃣ Real‑World Example

Below is a minimal Next.js page that demonstrates the full flow:

// pages/index.tsx
import Head from 'next/head';
import { useSiteLocale } from '@sitelocaleai/js';

export default function Home() {
  const { t, localizedPrice } = useSiteLocale();
  const priceUSD = 19.99;

  return (
    <>
      <Head>
        <title>{t('Welcome to Our Store')}</title>
        <meta name="description" content={t('Best products at unbeatable prices')} />
      </Head>
      <main>
        <h1>{t('Featured Product')}</h1>
        <p>{t('High‑quality headphones with noise cancellation.')}</p>
        <p>{t('Price')}: {localizedPrice(priceUSD)}</p>
      </main>
    </>
  );
}

• t() translates any string on the fly.
• localizedPrice() applies currency conversion and rounding.

Deploy, run the pre‑render CLI, and you’ll have /en/index.html, /es/index.html, etc., all ready for Google.

---

8️⃣ Wrap‑Up

By leveraging SiteLocaleAI’s self‑hosted, LLM‑powered translation and SEO pre‑rendering, you can turn a single‑language Next.js app into a multilingual powerhouse without touching your routing configuration. The result is faster time‑to‑market, lower development cost, and a measurable lift in international organic traffic.

---

Ready to Go Global?

Try SiteLocaleAI today and see how easy it is to add instant, SEO‑friendly internationalization to your Next.js project. 👉 Get started for $5 Indie or read the full docs at https://sitelocaleai.com/docs.