# Data and third-party licenses — Vocadawn of Offlinova

Site code: MIT License, Copyright (c) 2026 Offlinova (see LICENSE.txt).
The compiled word data (`words.json` and the word tables on the topic/level pages) combines the sources below.
Because it includes CC BY-SA 4.0 material, the compiled word data is shared under **CC BY-SA 4.0**.
All licenses below were checked on 2026-11-13.

| Source | Used for | License | Verified at |
|---|---|---|---|
| New General Service List (NGSL) 1.2 — Browne, C., Culligan, B. & Phillips, J. | Headwords, frequency rank, simple English definitions | CC BY-SA 4.0 | https://www.newgeneralservicelist.com/new-general-service-list (license block on the page) |
| New Academic Word List (NAWL) 1.2 — Browne, C., Culligan, B. & Phillips, J. | Academic headwords, English definitions, part of speech, Japanese glosses | CC BY-SA 4.0 | https://www.newgeneralservicelist.com/new-academic-word-list |
| Word Atlas (github.com/designfuchen/word-atlas, v1.0, 2026-10-25) — "Word Atlas contributors — CC BY 4.0" | UK IPA, CEFR level, one example sentence + its Chinese translation, Chinese glosses, fallback English definitions | Dataset CC BY 4.0 (code MIT) — CONTENT_LICENSE.md | https://github.com/designfuchen/word-atlas/blob/main/CONTENT_LICENSE.md |
| ECDICT (github.com/skywind3000/ECDICT) | Fallback phonetics, Chinese translations and English definitions; part-of-speech statistics; COCA frequency | MIT | https://github.com/skywind3000/ECDICT/blob/master/LICENSE |
| OpenCC dictionaries via opencc-js (build time only) | Converting Chinese glosses to Traditional characters | MIT AND Apache-2.0 | npm opencc-js 1.4.2 |
| ts-fsrs 6.0.0 | FSRS spaced-repetition scheduling (bundled in app.js) | MIT | npm ts-fsrs |

## Modifications (as required by CC BY / CC BY-SA)
- Only selected fields are used; multi-sense glosses are shortened to the first one or two senses; one example per word.
- Chinese glosses and example translations are converted from Simplified to Traditional characters for the zh-TW pages.
- Word Atlas notes its content is AI-generated and not proofread entry by entry; we spot-checked a sample (definitions, IPA, examples) and found it accurate, but it is provided as-is.
- Levels ("Foundation / Intermediate / Advanced", ≈ IELTS bands) are our own estimate from Word Atlas CEFR tags, NGSL rank and COCA frequency; they are not official IELTS bands.

## Our own material
- The topic decks (which headword goes into which deck) are Offlinova's own original grouping.
- All page texts (topic introductions, FAQ, instructions, privacy policy) are written by Offlinova.

## Not used
- designfuchen/word-atlas topic assignments and intro texts (we use our own grouping and texts).
- The Coxhead Academic Word List (author-copyrighted; no open commercial license).
- Any Cambridge, Oxford, British Council or IDP content. No IELTS trademark in brand or logo.

"IELTS" is a registered trademark of its owners. Not affiliated with or endorsed by the IELTS partners (British Council, IDP, Cambridge).