# Data attribution

The app design and interaction code are adapted from the adjacent, user-owned Kihongo Japanese app.

Vocabulary is adapted from [Complete HSK Vocabulary](https://github.com/drkameleon/complete-hsk-vocabulary), copyright (c) 2026 Yanis Zafirópulos, under the MIT License. The full MIT notice is in [data/raw/LICENSE](data/raw/LICENSE). The bundled source snapshot contains entries labeled old-1 through old-5; its upstream URL, retrieval date, and full-source SHA-256 are in [data/raw/SOURCE.json](data/raw/SOURCE.json).

Upstream credits dictionary definitions to [CC-CEDICT](https://www.mdbg.net/chinese/dictionary?page=cedict), by the CC-CEDICT community, based on CEDICT originally started by Paul Denisowski. CC-CEDICT is licensed under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). The adapted vocabulary data in `data/words.json` is shared under that license. No endorsement is implied.

Changes: selected and reordered a 2,000-card deck, removed duplicate headwords, shortened definitions, preferred common learner readings for ambiguous entries, normalized erhua notation, added alternate readings, and added original phrases, examples, translations, and pronunciation notes. Original phrase and example data in this directory is also made available under CC BY-SA 4.0 as part of the deck.

The upstream project also credits [clem109/hsk-vocabulary](https://github.com/clem109/hsk-vocabulary) for legacy HSK lists, [HSK-3.0-words-list](https://github.com/krmanik/HSK-3.0-words-list) for frequency rankings, [Make Me a Hanzi](https://github.com/skishore/makemeahanzi) for radicals, and SUBTLEX-CH / HanLP for parts of speech. The app uses HSK levels, frequency rankings, headwords, readings, and definitions; it does not display the radical or part-of-speech fields.