Seo Guide

Boost International SEO with Pre‑Rendered Gatsby Translations

Published August 19, 2026

Boost International SEO with Pre‑Rendered Gatsby Translations

Boost International SEO with Pre‑Rendered Gatsby Translations

*Static sites are fast, secure, and cheap – but they often fall short when you need to reach a global audience. By pre‑rendering each language version of your Gatsby site, you give Google a fully indexed, crawl‑able page for every locale. SiteLocaleAI makes this process painless with a drop‑in JavaScript library, a CLI for static generation, and built‑in price localization.

Why Pre‑Render Translations?

  • Instant indexing – Google bots see the final HTML, not a client‑side script that runs after the page loads.
  • Zero runtime cost – No extra API calls for every visitor; the translation is baked into the static files.
  • Better Core Web Vitals – Pre‑rendered pages load instantly, preserving Gatsby’s performance edge.

If you rely on on‑the‑fly translation widgets, you risk thin content warnings and slower page speed scores. Pre‑rendering solves both problems.

Prerequisites

Item Version
Gatsby CLI ^4.0.0
Node.js >=18
SiteLocaleAI API key Claude, GPT‑4o‑mini, etc.
Git any recent version

Make sure you have a working Gatsby project (gatsby new my-site).

1️⃣ Install SiteLocaleAI

npm i @sitelocaleai/core

The library is framework‑agnostic, so you can import it anywhere in your React components, Vue files, or plain HTML.

2️⃣ Configure Your Locales

Create a locales folder at the project root. Inside, add a JSON file per language:

// locales/en.json
{
  "title": "Welcome to Our Store",
  "price": "${price}"
}

// locales/es.json
{
  "title": "Bienvenido a Nuestra Tienda",
  "price": "${price}"
}

You can add as many locales as you need. SiteLocaleAI will handle psychological rounding (e.g., $9.99 → $10) based on the currency you specify.

3️⃣ Generate Translated Pages with the CLI

SiteLocaleAI ships a CLI that reads your source pages, translates them, and writes static HTML files for each locale.

npx @sitelocaleai/cli generate \
  --src ./src/pages \
  --out ./public \
  --locales ./locales \
  --apiKey $SITELOCALEAI_API_KEY

The command does three things:
1. Parses each React page to extract translatable strings.
2. Calls your LLM API (Claude, GPT‑4o‑mini, etc.) with the target language.
3. Writes index.html files under /en/, /es/, … inside the public folder.

Tip: Run the CLI as part of your build script ("build": "gatsby build && siteLocaleAI generate"). This guarantees that every deploy contains up‑to‑date translations.

4️⃣ Wire Up Language Switching (Client‑Side)

Even though pages are pre‑rendered, you still want a UI element that lets users jump between locales. SiteLocaleAI’s drop‑in script takes care of the URL handling.

<!-- In your layout component -->
<script type="module">
  import { initLocaleSwitcher } from '@sitelocaleai/core';
  initLocaleSwitcher({
    defaultLocale: 'en',
    supportedLocales: ['en', 'es', 'de', 'jp'],
    // Optional: price formatting per locale
    priceFormatter: (value, locale) => new Intl.NumberFormat(locale, { style: 'currency', currency: 'USD' }).format(value)
  });
</script>

<nav>
  <a href="/en/">English</a> |
  <a href="/es/">Español</a> |
  <a href="/de/">Deutsch</a> |
  <a href="/jp/">日本語</a>
</nav>

No Node.js is required on the client; the script simply reads the current path and redirects to the matching locale folder.

5️⃣ Verify Google Indexing

  1. Submit a sitemap that lists each locale URL (/en/sitemap.xml, /es/sitemap.xml). SiteLocaleAI can generate a multilingual sitemap automatically: bash npx @sitelocaleai/cli sitemap --locales ./locales --out ./public/sitemap.xml
  2. Use Google Search Console → URL Inspection → test a translated URL (e.g., https://example.com/es/). You should see the full HTML with translated content.
  3. Check the lang attribute in the <html> tag. The CLI injects <html lang="es"> for Spanish pages, which helps Google understand the language.

6️⃣ Price Localization with Psychological Rounding

When you render prices, let SiteLocaleAI handle rounding to the nearest “psychological” value (e.g., €9.99 → €10). In your component:

import { formatPrice } from '@sitelocaleai/core';

const Product = ({ price, currency }) => (
  <p>{formatPrice(price, currency, { locale: 'de' })}</p>
);

The helper respects the locale’s rounding rules and adds the correct currency symbol.

7️⃣ Deploy

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Because the site is fully static, you can host it on Netlify, Vercel, Cloudflare Pages, or any CDN. Just push the public folder generated by gatsby build && siteLocaleAI generate.

🎯 Bottom Line

Pre‑rendering translations with SiteLocaleAI gives you the best of both worlds: instant, crawlable multilingual pages and zero runtime translation cost. Your Gatsby site stays fast, your SEO scores improve, and your international customers see prices that feel natural.

Ready to Go Global?

Try SiteLocaleAI today and see how easy it is to turn any static site into a multilingual SEO powerhouse. Get started now and watch your global traffic soar!

For deeper technical details, visit the official documentation:
- SiteLocaleAI Docs – Gatsby Integration
- Full API Reference

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