wordfreq
English vocabulary selections were informed by wordfreq 3.1.1, Copyright 2022 Robyn Speer. Its frequency snapshot runs through approximately 2021. Current topical names were separately authored.
Vocabulary was filtered for game suitability, names, acronyms and exclusions, compiled for each shared letter wheel, and arranged in original Capitol Words puzzles. The game does not bundle the wordfreq frequency database, source article text or a macOS dictionary file.
The packaged campaign, daily and bonus-word data are licensed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0). wordfreq's code uses Apache 2.0; the game and its content tools do not copy or require that code. See the wordfreq notices.
Upstream source credits
- Google Books Ngram Viewer.
- Leeds Internet Corpus, University of Leeds Centre for Translation Studies.
- Wikipedia contributors.
- ParaCrawl.
- OPUS and OpenSubtitles 2018, originating from OpenSubtitles.
- SUBTLEX-US: Marc Brysbaert and Boris New (2009).
- SUBTLEX-UK: Walter J. B. van Heuven, Pawel Mandera, Emmanuel Keuleers and Marc Brysbaert (2014). SUBTLEX is freely available data.
Licensed puzzle data
You may copy and adapt the licensed data, including commercially, under CC BY-SA 4.0. Keep the supplied credits and license link, identify changes, and distribute adaptations under the same license. The license's legal text sets the terms.
These files retain their embedded attribution and modification notices. The data license applies to the identified puzzle packages. Artwork and app code have separate rights.
Topic references
Individual puzzles link to their source references where available. Themes provide context for wordplay. To flag a spelling, context or source problem, report the puzzle with its ID and revision.