Translating a Website into 8 Languages with AI Agents in One Night

How I used Claude Sonnet 4.6 and fleets of GitHub Copilot Coding Agents to internationalize java.evolved — from spec to deployment java.evolved is a static site I built to showcase modern Java patterns side-by-side with their legacy equivalents. 112 patterns across 11 categories — language, collections, streams, concurrency, and more — each with code comparisons, explanations, and curated documentation links. All generated from YAML content files by a JBang-powered Java build script. By the end of February 25, the entire site was English-only. By the morning of February 26, it was available in 9 languages — English, German, Spanish, Portuguese (Brazil), Simplified Chinese, Arabic, French, Japanese, and Korean — with full RTL support for Arabic. The total human effort was a few hours of prompting, reviewing PRs, and filing one bug. This is the story of that experiment. The Architecture Decision: Let the AI Draft the Spec The first step wasn't writing code. It was writing a specification