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LecteurAide French reading companion

LecteurAide

Updated Nov 2025

Git Repo
PythonFastAPIVertex AI GeminiCloud TranslationNext.js

LecteurAide is a French reading companion for long-form PDFs. It ingests a book, segments it into scenes, translates sentences, extracts vocabulary, and generates comprehension questions before presenting everything in a purpose-built reading interface.

Six-stage pipeline: PDF extraction, heading stripping, sentence segmentation, Cloud Translation, chunking, and Gemini annotation

Context-aware scene segmentation that passes previous scene summaries to maintain narrative coherence across chunks

SSE-streaming upload progress, keyboard-navigable scene reader, and click-to-jump vocabulary highlighting

What I built

  • FastAPI backend for book upload, scene segmentation, translation, vocabulary extraction, and persistence
  • Next.js frontend for upload, library browsing, and scene-by-scene reading
  • Vertex AI and Google Cloud Translation pipeline for turning raw PDFs into guided reading experiences

How it works

  1. 1Upload a French PDF and title via the ingestion API
  2. 2Segment the text into scenes and annotate it with translations, vocab, and questions
  3. 3Persist the processed book and render it through the web reader

Results

  • ✓Turns static PDFs into an interactive reading workflow
  • ✓Combines document ingestion, translation, and reader UX in one end-to-end product

Next steps

  • Add screenshots and a richer sample book walkthrough
  • Expand the reader with stronger review and spaced-repetition loops