Credits and attributions
ChuSchool uses the fonts and data below. We thank their authors; each is used under its own licence.
Fonts
LXGW WenKai
- Used for
- Displaying Chinese characters and pinyin (subsets trimmed to the characters we use).
- Copyright
- Copyright 2021-2024 LXGW; Copyright 2020 The Klee Project Authors
- Licence
- SIL Open Font License 1.1 · Full licence text
- Source
- github.com/lxgw/LxgwWenKai
BabelStone Han
- Used for
- Temporary display of a few rare component glyphs. We extracted 141 glyphs and converted them to WOFF2; the modified font is freely available under the same licence: chuschool.com/fonts/babelstone-ext-temp.woff2
- Copyright
- (c) 1994-1999 Arphic Technology Co., Ltd.; (c) 2009-2025 Andrew West
- Licence
- Arphic Public License · Full licence text
- Source
- www.babelstone.co.uk/Fonts/Han.html
Jigmo2
- Used for
- A fallback in the textbook PDFs when the main font lacks a character: used only for rare extension-block characters (currently just one), trimmed to a subset.
- Copyright
- Koichi Kamichi (glyphs from GlyphWiki)
- Licence
- CC0 1.0 Universal (public domain dedication) · Full licence text
- Source
- kamichikoichi.github.io/jigmo/
Noto Sans Arabic
- Used for
- Arabic interface text.
- Copyright
- Copyright 2022 The Noto Project Authors
- Licence
- SIL Open Font License 1.1 · Full licence text
- Source
- github.com/notofonts/arabic
Data
CC-CEDICT
- Used for
- Pinyin for words.
Word pinyin (including neutral tones) is derived from CC-CEDICT readings: we generate it with pypinyin and pypinyin-dict, which use CC-CEDICT data, and we changed it by marking the tone changes of yī and bù as textbooks do. The derived word pinyin is under CC BY-SA 4.0.
Word meanings in English, Malay and Arabic are our own translations and are not taken from CC-CEDICT definitions. - Copyright
- MDBG
- Licence
- Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0) · Full licence text
- Source
- www.mdbg.net/chinese/dictionary?page=cc-cedict
DB-IP IP to Country Lite
- Used for
- Pre-selecting a visitor's country or region from their network (IP) address on the membership and pricing pages. Looked up on our own server; neither the IP address nor the result is stored.
- Copyright
- IP Geolocation by DB-IP (db-ip.com)
- Licence
- Creative Commons Attribution 4.0 International (CC BY 4.0) · Full licence text
- Source
- db-ip.com/db/download/ip-to-country-lite
Audio
The spoken audio in our courses is synthetic speech generated in advance with Microsoft Azure AI Speech from our course text. It is not a recording of a human teacher. Only course text is sent to generate it; no personal information is involved.