Content Licensing
Wikipedia & Wikimedia Content
Some educational content on LexFlexer is adapted from articles on Wikipedia and other Wikimedia projects. This content is used under the Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0).
In accordance with the license terms:
- Original sources are attributed on each book or list that uses Wikipedia content.
- Content may be modified, adapted, or condensed for educational purposes.
- Adapted content is shared under the same CC BY-SA 4.0 license.
- For full author attribution, refer to the revision history of the linked Wikipedia article.
Wikiquote Content
Quotes sourced from Wikiquote are used under the CC BY-SA 3.0 or CC BY-SA 4.0 license. Quotes are attributed to their original authors where known.
AI-Generated Content
Word definitions, examples, etymology, difficulty scores, and other enrichment data may be generated using AI language models. LexFlexer does not claim ownership of publicly available dictionary definitions or quotes attributed to their original authors. See our Privacy Policy for details on how AI services are used.
Software & Assets
LexFlexer is built with open-source software. We gratefully acknowledge the following projects and their contributors:
Fonts
- Plus Jakarta Sans — SIL Open Font License 1.1
- Poppins — SIL Open Font License 1.1
- Lora — SIL Open Font License 1.1
- Atkinson Hyperlegible — SIL Open Font License 1.1
Icons
- Lucide Icons — ISC License
UI Framework & Libraries
- React — MIT License
- Radix UI — MIT License
- Tailwind CSS — MIT License
- Vite — MIT License
- TanStack Query — MIT License
All runtime packages
Every package the running app ships or depends on, with the version deployed and its licence. Generated from the build itself, so it cannot fall out of date.
- @dnd-kit/core 6.3.1 — MIT
- @dnd-kit/sortable 10.0.0 — MIT
- @dnd-kit/utilities 3.2.2 — MIT
- @fontsource-variable/lora 5.3.0 — OFL-1.1
- @fontsource-variable/plus-jakarta-sans 5.3.0 — OFL-1.1
- @fontsource/atkinson-hyperlegible 5.3.0 — OFL-1.1
- @fontsource/poppins 5.3.0 — OFL-1.1
- @hookform/resolvers 5.7.1 — MIT
- @radix-ui/react-accordion 1.2.20 — MIT
- @radix-ui/react-alert-dialog 1.1.23 — MIT
- @radix-ui/react-aspect-ratio 1.1.15 — MIT
- @radix-ui/react-checkbox 1.3.11 — MIT
- @radix-ui/react-collapsible 1.1.20 — MIT
- @radix-ui/react-dialog 1.1.23 — MIT
- @radix-ui/react-dropdown-menu 2.1.24 — MIT
- @radix-ui/react-label 2.1.15 — MIT
- @radix-ui/react-popover 1.1.23 — MIT
- @radix-ui/react-progress 1.1.16 — MIT
- @radix-ui/react-select 2.3.7 — MIT
- @radix-ui/react-slider 1.4.7 — MIT
- @radix-ui/react-slot 1.3.3 — MIT
- @radix-ui/react-switch 1.3.7 — MIT
- @radix-ui/react-tabs 1.1.21 — MIT
- @radix-ui/react-toast 1.2.23 — MIT
- @radix-ui/react-toggle 1.1.18 — MIT
- @radix-ui/react-tooltip 1.2.16 — MIT
- @sentry/node 10.75.3 — MIT
- @sentry/react 10.53.1 — MIT
- @tanstack/react-query 5.104.0 — MIT
- @tiptap/core 3.31.3 — MIT
- @tiptap/extension-color 3.31.3 — MIT
- @tiptap/extension-link 3.31.3 — MIT
- @tiptap/extension-text-style 3.31.3 — MIT
- @tiptap/pm 3.31.3 — MIT
- @tiptap/react 3.31.3 — MIT
- @tiptap/starter-kit 3.31.3 — MIT
- browser-image-compression 2.0.2 — MIT
- class-variance-authority 0.7.1 — Apache-2.0
- clsx 2.1.1 — MIT
- compression 1.8.2 — MIT
- cookie-parser 1.4.7 — MIT
- dompurify 3.4.16 — (MPL-2.0 OR Apache-2.0)
- express 5.2.1 — MIT
- helmet 8.1.0 — MIT
- lucide-react 0.453.0 — ISC
- mustache 4.2.0 — MIT
- posthog-js 1.434.18 — (Apache-2.0 AND MIT)
- react 18.3.1 — MIT
- react-dom 18.3.1 — MIT
- react-helmet-async 3.0.0 — Apache-2.0
- react-hook-form 7.89.0 — MIT
- react-image-crop 11.1.2 — ISC
- react-joyride 3.2.0 — MIT
- recharts 3.10.1 — MIT
- tailwind-merge 2.6.1 — MIT
- tailwindcss-animate 1.0.7 — MIT
- tesseract.js 7.0.0 — Apache-2.0
- uuid 14.0.2 — MIT
- wouter 3.11.0 — Unlicense
- zod 4.4.3 — MIT
Video Rendering
LexFlexer’s book videos are created with Remotion. Remotion is source-available under the Remotion License rather than a permissive open-source licence, and parts of it (the remotion and @remotion/player packages) are included in the code delivered to your browser. LexFlexer is operated by Gorgeous Games Ltd, which uses Remotion under that licence’s Free License tier. Copyright © Remotion.
Your Rights
Content you create on LexFlexer (word lists, notes, and study data) remains your property, as outlined in our Terms of Service.
If you believe any content on LexFlexer infringes on your copyright or licensing rights, please contact us at [email protected].