Document Localization Studio

Source: Dev.to

Overview

Document Localization Studio is a terminal‑first + UI‑powered application that localizes documents beyond basic translation. It addresses real‑world complexities encountered by enterprise teams, such as terminology adaptation, date/time conversion, currency handling, unit conversion, address formatting, tax label changes, and legal clause protection.

Key Features

• Language & Terminology – Custom glossary with reusable term memory.
• Date/Time & Timezone – Automatic conversion (e.g., America/New_York → Europe/Berlin).
• Currency & FX – Convert USD to EUR, JPY, BRL, etc., with editable locale defaults.
• Unit Conversion – Miles → kilometers, pounds → kilograms, °F → °C, and more.
• Address/Phone/Postal – Locale‑specific labels and phone formatting.
• Tax Label Adaptation – Switch “Sales Tax” to VAT/GST‑style labels.
• Legal Clause Lock – [[LOCK]]...[[/LOCK]] blocks with auto‑protection for legal sentences.
• Structure‑Aware QA – Preserves placeholders, warns on length changes, flags cross‑references/TOC, and supports workflow gating.

Supported Formats

• Plain text (.txt)
• Word documents (.docx)
• PDFs (.pdf) – includes a layout‑preserving mode for editable PDFs when available.
• Images (.png, .jpg, .jpeg) – processed via OCR.

Supported Locales

de_de, es_es, fr_fr, it_it, ja_jp, ko_kr, pt_br, zh_cn, zh_tw

Installation & Usage

# Navigate to the project directory
cd "/Users/swatigoyal/Documents/New project/document_localizer_challenge"

CLI Example

# Example command (replace with actual CLI syntax)
document-localizer --input invoice.pdf --target-locale de_de --output localized_invoice.pdf

Live Demo

• Repository:
• Demo video:

Walkthrough Idea

1. Upload a real invoice or contract PDF (or a DOCX).
2. Pick a target locale (e.g., de_de). The default FX rate auto‑loads (editable).
3. Toggle components (units, tax labels, legal lock, term memory).
4. Run localization.
5. Review the outputs:
   • 📊 Before/After scorecards
   • 🔎 Side‑by‑side visual diff
   • 🌡️ Layout risk heatmap
   • 🧾 QA report (JSON)
6. Download the localized file and the QA report.

Built With

• Streamlit – UI dashboard
• python-docx – DOCX read/write
• pypdf – PDF text extraction
• pymupdf (PyMuPDF) – Layout‑preserving PDF localization mode
• reportlab – PDF re‑render fallback when layout mode isn’t available
• Pillow + pytesseract – OCR pipeline for screenshots/images

OCR note: Screenshot localization requires a local Tesseract binary (e.g., brew install tesseract on macOS).

Copilot CLI Integration

GitHub Copilot CLI was used as a coding partner directly in the terminal to:

• Scaffold modules quickly (pipeline, PDF/DOCX/image I/O, CLI wiring)
• Iterate on regex‑heavy transformations (dates, currency, units, placeholders)
• Design locale profiles/defaults and keep logic consistent
• Wire Streamlit controls to the backend config without breaking flow
• Add QA heuristics and sensible fallback paths for PDFs/OCR
• Speed up refactors while keeping the project clean and extensible

The biggest win: fast iteration on non‑trivial logic (PDF handling, transformation rules, feature toggles) without leaving the terminal.

Future Directions

• LLM‑backed translation while preserving deterministic transforms and locks
• Smarter terminology alignment with context‑aware term choice and consistency scoring
• Stronger compliance checks via policy packs per industry/locale
• Plug‑in architecture for new transforms and QA rules
• Improved OCR layout reconstruction for tables, columns, headers/footers

Call for Feedback

If you’ve worked on localization, I’d love your input: which transformations or QA checks would you trust most in production?