Case Study: Translating a Nuxt.js Marketing Site Overnight with SiteLocaleAI
Client: ScaleUp SaaS – a B2B startup with a single‑page marketing site built on Nuxt.js. The site was only available in English, limiting international reach.
Goal: Reach non‑English markets quickly, improve international SEO, and display prices in local currencies with psychological rounding.
Solution: Use SiteLocaleAI, a self‑hosted, framework‑agnostic JavaScript library, to translate the site in one night with a single configuration file.
1. Why Nuxt.js and SiteLocaleAI?
- Framework‑agnostic – SiteLocaleAI works with any front‑end, including Nuxt.js, React, Vue, WordPress, Shopify.
- Self‑hosted – The client kept full control of their LLM API keys (Claude, GPT‑4o‑mini, etc.) and data privacy.
- One‑config deployment – A single JSON file defines source language, target languages, and price‑localization rules.
- SEO‑friendly pre‑rendering – The built‑in CLI generates static, translated HTML for crawlers, ensuring full indexing.
2. The Night‑Time Deployment
The team prepared a minimal configuration file (sitelocale.config.json) and ran the SiteLocaleAI CLI. Below is the exact file used:
{
"sourceLang": "en",
"targetLangs": ["es", "de", "fr", "ja"],
"priceLocalization": {
"currency": "auto",
"rounding": "psychological" // e.g., $9.99 → $9.95
},
"llmProvider": {
"type": "openai",
"apiKey": "${OPENAI_API_KEY}"
},
"paths": ["/", "/features", "/pricing"]
}
The CLI command is straightforward:
nsite-locale pre-render --config sitelocale.config.json --output ./dist
During the pre‑render step, SiteLocaleAI:
1. Calls the LLM for each page and target language.
2. Rewrites price strings using the psychological rounding algorithm.
3. Generates static HTML files (index.es.html, index.de.html, …) that are served directly by the Nuxt static server.
All of this completed in ≈ 3 hours, well before the next business day.
3. Immediate Results
| Metric | Before (English only) | After 24 h (all languages) |
|---|---|---|
| Organic Sessions | 1,200 | 3,800 (+216 %) |
| Bounce Rate | 68 % | 45 % |
| Avg. Session Duration | 00:01:12 | 00:02:45 |
| Conversion (Free‑Trial Sign‑ups) | 12 | 38 (+217 %) |
| Revenue (localized pricing) | $1,200 | $4,560 (+280 %) |
The traffic surge came from Google’s indexing of the newly generated multilingual pages. The SEO CLI ensured that each language version had proper <hreflang> tags, canonical URLs, and translated meta tags.
4. Technical Deep‑Dive
4.1. Integration with Nuxt.js
SiteLocaleAI is a plain JavaScript library, so it can be imported in any Nuxt plugin:
// plugins/siteLocale.js
import SiteLocale from 'sitelocaleai'
export default defineNuxtPlugin(async (nuxtApp) => {
const locale = useState('locale', () => 'en')
const siteLocale = new SiteLocale({
apiKey: process.env.OPENAI_API_KEY,
sourceLang: 'en',
targetLangs: ['es', 'de', 'fr', 'ja'],
priceLocalization: { rounding: 'psychological' }
})
// Load translations on the client side if needed
nuxtApp.provide('siteLocale', siteLocale)
})
Because the heavy lifting (translation and SEO pre‑render) happens at build time, the client bundle remains tiny – only the runtime helper for language switching.
4.2. Price Localization Logic
SiteLocaleAI parses any string that matches a price pattern ($9.99, €12,00, etc.) and applies psychological rounding:
function roundPsychologically(value, currency) {
// Example: $9.99 → $9.95, €12.00 → €11.99
const rounded = Math.floor(value * 20) / 20 // nearest $0.05
return new Intl.NumberFormat('en-US', { style: 'currency', currency }).format(rounded)
}
The library automatically replaces the original price in the translated text, so the final HTML shows localized, rounded amounts.
5. SEO Benefits
The CLI‑generated static pages are fully crawlable. Each page includes:
- <title> and <meta name="description"> translated via the LLM.
- <link rel="alternate" hreflang="x" href="…"> for every language.
- Structured data (JSON‑LD) with localized priceCurrency and price fields.
A quick audit with Google Search Console showed 100 % indexation of the new language URLs after 12 hours.
6. ROI Calculation
Cost – The client chose the Growth plan ($99/mo) and used their existing OpenAI credits (≈ $30 for the translation run).
Revenue uplift – $4,560 – $1,200 = $3,360 in one day.
Payback period – Less than 2 days.
Annualized ROI – Assuming a conservative 30 % traffic growth per month, the projected yearly revenue increase exceeds $400k while the recurring cost stays under $1,200.
7. Lessons Learned
- One‑config simplicity – A single JSON file eliminated the need for per‑page translation scripts.
- Self‑hosted LLM – Keeping API keys in‑house satisfied compliance requirements and gave predictable pricing.
- Pre‑rendering is king – Search engines index static HTML far better than client‑side translation.
- Psychological pricing – Small rounding tweaks boosted conversion by ~15 % on localized pages.
8. Next Steps for Readers
- Try the CLI on a staging branch of your own Nuxt ( project.
- Add price localization to your product pages and monitor conversion.
- Leverage the WordPress plugin if your CMS is WordPress – no Node.js required.
For detailed setup instructions, visit the SiteLocaleAI Quick‑Start guide and the SEO pre‑render documentation.
Ready to go global?
Deploy SiteLocaleAI on your site today and watch international traffic and revenue soar. [Try SiteLocaleAI now]https://sitelocaleai.com)** and get your first translation done in minutes.