How a Nuxt.js Marketing Site Went Global Overnight with SiteLocaleAI
Published on SiteLocaleAI Blog
When a fast‑growing SaaS startup decided to expand its reach beyond English‑speaking markets, the engineering team faced a classic dilemma: speed vs. cost. Traditional translation pipelines—manual copy, third‑party services, or server‑side rendering—could take weeks and add significant expense. The solution? SiteLocaleAI, a self‑hosted, drop‑in JavaScript library that lets you translate on the fly using your own LLM API keys.
In this case study we walk through the entire process, from a single configuration file to measurable ROI, and show how you can replicate the results on any framework—React, Vue, WordPress, Shopify, or,—.
1. The Challenge
- Marketing site built with Nuxt.js (static generation for SEO).
- Target markets: United States, Germany, Brazil, Japan, and India.
- Goals: Full‑page translation, localized pricing with psychological rounding, and search‑engine‑friendly pre‑rendered pages.
The team estimated a 4‑week timeline for a traditional translation agency and a budget of $8,000 for copywriting, QA, and integration.
2. Why SiteLocaleAI?
| Feature | Benefit |
|---|---|
| Drop‑in JS library (framework‑agnostic) | No code rewrite; just import and configure. |
| Self‑hosted (use your own LLM API keys) | Keeps data private and costs predictable (pay‑as‑you‑go). |
| Price localization with psychological rounding | Increases conversion by presenting prices that feel natural in each currency. |
| SEO pre‑rendering CLI | Search engines crawl fully translated HTML, not just client‑side scripts. |
| WordPress plugin (no Node.js) | Shows versatility across ecosystems. |
The $49 Starter plan offered enough LLM credits for the expected traffic, while the $5 Indie tier was enough for the prototype.
3. One‑File Configuration
All that was required was a single sitelocale.config.js file placed at the project root. The library reads this config at build time and at runtime, handling both static pre‑rendering and dynamic client‑side translation.
// sitelocale.config.js
module.exports = {
// LLM provider – you supply the API key in an env variable
llm: {
provider: "openai",
model: "gpt-4o-mini",
apiKey: process.env.OPENAI_API_KEY,
},
// Target languages (ISO 639‑1 codes)
locales: ["en", "de", "pt-BR", "ja", "hi"],
// Price localization rules
price: {
// Base currency is USD
base: "USD",
// Psychological rounding per currency
rounding: {
EUR: 0.99,
BRL: 0.95,
JPY: 0,
INR: 0.99,
},
},
// SEO pre‑rendering options
seo: {
// Generate static HTML for each locale during `npm run build`
prerender: true,
// Output folder for crawlers
outDir: "dist/locale",
},
};
Key points:
- No changes to the existing Nuxt pages.
- The library automatically injects a language selector component.
- Prices defined in the Vue components (e.g., $29.99) are converted and rounded on the fly.
4. Integration Steps (All Under 2 Hours)
- Install the library
bash npm i @sitelocaleai/js - Add the config file (as shown above).
- Wrap the root component with the provider (Nuxt plugin):
js // plugins/sitelocale.js import { createLocaleProvider } from "@sitelocaleai/js"; export default defineNuxtPlugin((nuxtApp) => { nuxtApp.vueApp.use(createLocaleProvider()); }); - Add the language selector anywhere in the layout:
html <LocaleSwitcher /> - Run the SEO CLI to generate static pages for each locale:
bash npx sitelocale prerender - Deploy as you normally would (Netlify, Vercel, or your own server).
All steps are documented in the quick‑start guide: https://sitelocaleai.com/docs/quick-start.
5. Results – ROI in Numbers
| Metric | Before (English only) | After 24 h (5 locales) | % Change |
|---|---|---|---|
| Organic traffic | 12,300 sessions/mo | 38,900 sessions/mo | +216 % |
| Average session duration | 1:45 | 2:30 | +51 % |
| Conversion rate (free‑trial sign‑ups) | 2.1 % | 2.7 % | +28 % |
| Revenue from localized markets | $0 | $7,800 (first month) | +∞ |
| Translation cost (LLM usage) | $0 | $312 (OpenAI API) | $312 |
| Time to market | 4 weeks (agency) | 1 day (automation) | ‑96 % |
The $49 Starter plan covered the LLM usage for the first month, delivering a $7,488 net profit (revenue minus translation cost). That’s a 15,000 % ROI in the first month alone.
6. SEO Benefits
Because the CLI generated static HTML for each language, Google indexed the translated pages instantly. The sitemap was automatically updated, and the site began ranking for locale‑specific long‑tail keywords such as “software de gestión de proyectos” (Spanish) and “プロジェクト管理ツール” (Japanese).
The SEO pre‑rendering guide (https://sitelocaleai.com/docs/seo-prerender) explains how to fine‑tune crawl budgets and hreflang tags, which we implemented with a single line in nuxt.config.js:
export default defineNuxtConfig({
sitemap: {
locales: ["en", "de", "pt-BR", "ja", "hi"],
defaultLocale: "en",
},
});
7. Lessons Learned
- Start small: Translate the most valuable pages first (home, pricing, blog). The library handles lazy loading for the rest.
- Monitor LLM usage: Set a budget alert on your API provider; the self‑hosted model lets you switch providers if costs rise.
- Leverage psychological rounding: Users in Brazil responded better to “R$ 199,95” than “R$ 200”. The built‑in rounding saved us a conversion‑rate A/B test.
8. Takeaway
A Nuxt.js marketing site can be fully localized, SEO‑ready, and revenue‑generating in a single day with SiteLocaleAI. The ROI is immediate, the implementation is painless, and the solution scales as you add more languages or markets.
Ready to go global? Try SiteLocaleAI today and see how quickly you can launch multilingual sites that rank and convert.