{"slug": "how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data", "title": "How I Built a 100% AI-Generated Document Translator with WCAG AAA & Zero-Data Retention", "summary": "A developer built a full-stack document translator entirely through AI-driven 'Vibe Coding,' converting legal and bureaucratic texts into everyday Portuguese while enforcing WCAG AAA accessibility and LGPD compliance. The project, called Real-World Document Translator, uses a FastAPI backend with PII sanitization and Google Gemini API integration, and can run in a mock mode for offline testing.", "body_md": "Overview:A full-stack, production-grade web application created entirely via AI/Vibe Coding. It converts complex legal terms, fine print, and bureaucratic bills into everyday Portuguese while enforcing WCAG AAA accessibility and strict LGPD compliance.\n\nRecently, I set out to test the limits of **Vibe Coding** by building an end-to-end software product using AI-driven development.\n\nThe result is the **Real-World Document Translator** (*Tradutor de Documentos da Vida Real*). Its goal is to bridge the accessibility gap for elderly individuals, people with low vision, and folks with limited literacy—allowing anyone to understand legal and financial contracts without needing a lawyer.\n\nTranslating legal documents through AI presents two major technical hurdles:\n\n| Challenge | Impact / Risk |\n|---|---|\nPrivacy & LGPD |\nRaw documents contain sensitive PII (CPFs, bank accounts, emails). Standard regex fails due to OCR noise (broken numbers, homoglyphs). |\nAccessibility |\nMost web tools ignore low-vision users and the elderly, lacking high contrast, scalable typography, and native screen reader tools. |\n\nThrough iterative prompting and AI engineering, we designed a zero-trust, highly accessible architecture.\n\n`.env`\n\nvariables.[ User ] ───▶️ [ Accessible Frontend (HTML/CSS/JS) ]\n\n│\n\n▼\n\n[ Secure BFF (FastAPI) ]\n\n├── File Validation (Magic Bytes)\n\n├── PII Sanitization (OCR-Resilient)\n\n└── API Key Guard (.env)\n\n│\n\n▼\n\n[ Google Gemini API / Mock AI ]\n\nBuilding this project 100% through AI was a major technical milestone. It proved that Vibe Coding isn't just about speeding up syntax—it's about directing AI to construct **secure, accessible, and architecturally sound systems**.\n\n**Key takeaways from this build:**\n\nWant to test it locally? Follow these simple steps using Python 3.10+:\n\n```\nbash\n# 1. Clone repo & install dependencies\npip install -r backend/requirements.txt\n\n# 2. Run the application\npython backend/server.py\n\n# 3. Open [http://127.0.0.1:8000](http://127.0.0.1:8000) in your browser\nNote: If no Gemini API key is configured, the server automatically defaults to Smart Mock AI mode for instant offline testing!\n```\n\n", "url": "https://wpnews.pro/news/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data", "canonical_source": "https://dev.to/luizgarcg/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data-retention-422e", "published_at": "2026-08-28 12:09:21+00:00", "updated_at": "2026-08-28 12:50:41.139803+00:00", "lang": "en", "topics": ["developer-tools", "ai-tools", "generative-ai"], "entities": ["Real-World Document Translator", "FastAPI", "Google Gemini", "LGPD", "WCAG"], "alternates": {"html": "https://wpnews.pro/news/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data", "markdown": "https://wpnews.pro/news/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data.md", "text": "https://wpnews.pro/news/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data.txt", "jsonld": "https://wpnews.pro/news/how-i-built-a-100-ai-generated-document-translator-with-wcag-aaa-zero-data.jsonld"}}