Data sources & licenses

• CC-CEDICT, published by MDBG. CC BY-SA 4.0. Changed: converted to JSON, pinyin with tone marks (zh-dictionary).
• Unicode Character Database (Unihan), © Unicode, Inc. Unicode License v3.
• BabelStone IDS database by Andrew West.
• Make Me a Hanzi by Shaunak Kishore. Etymologies: LGPL 3.0. Stroke data derived from AR PL KaitiM GB and AR PL UKai, © 1999 Arphic Technology Co., Ltd., Arphic Public License.
• complete-hsk-vocabulary. MIT.
• HSK 3.0 (2025) transcription: hsk-tutor.com, original syllabus rights retained.
• Tatoeba and its contributors. CC BY 2.0 FR.
• AISHELL-1 and AISHELL-3, © Beijing Shell Shell Technology Co., Ltd. Apache License 2.0. Changed: recordings converted from WAV to MP3 (notices).
• wordfreq by Robyn Speer, CC BY-SA 4.0, drawing on Wikipedia, OpenSubtitles, SUBTLEX-CH by Qing Cai and Marc Brysbaert, Google Books Ngrams, news, web text and Twitter.