Credits and licences

Where the game's text, images, fonts and sounds come from, and their licences.

Card text from Wikipedia

Card titles, short descriptions and excerpts come from Wikipedia articles written by Wikipedia's volunteer editors. The text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Excerpts are copied word for word and only shortened.

Every card has a small "W · CC BY-SA" mark. Tapping it opens the card's credits, which show:

the article's title and the Wikipedia language it comes from;
a link to the article, whose page history lists its authors;
the licence, with a link;
a note that the excerpt is shortened;
the date of the article version used.

Card data from Wikidata

Types, dates, countries and links between cards come from Wikidata, available under CC0. Statistics such as page views come from public Wikimedia data.

Images from Wikimedia Commons

Card images come from Wikimedia Commons. We use only freely licensed images: public domain, CC0, CC BY and CC BY-SA. Each card's credits name the image's author and licence and link to its page on Commons. Card pictures are cropped and redrawn as pixel art in a few colours (dithered and recoloured); the original is on Commons.

We don't use logos, images with trademark or personality-right restrictions, or photos of living people. When there is no suitable image, the card shows artwork drawn from the article's data instead, marked "Drawn from data".

Map outlines

The globe drawn on place cards uses country outlines from Natural Earth, which are in the public domain.

Fonts

The game and this website use these fonts, all licensed under the SIL Open Font License 1.1:

Galmuri: Copyright (c) 2019–2025 Lee Minseo (quiple@quiple.dev). Licence text
Tiny5: Copyright 2022-2024 The Tiny5 Project Authors (https://github.com/Gissio/font_tiny5). Licence text
Fusion Pixel: Copyright (c) 2022, TakWolf (https://takwolf.com). Licence text
Noto Sans: Copyright 2022 The Noto Project Authors (https://github.com/notofonts/thai). Licence text
Noto Sans Thai: Copyright 2022 The Noto Project Authors (https://github.com/notofonts/thai). Licence text
Noto Sans Devanagari: Copyright 2022 The Noto Project Authors (https://github.com/notofonts/devanagari). Licence text
Handjet: Copyright 2018 The Handjet Project Authors (https://github.com/rosettatype/Handjet/). Licence text

Sounds and music

Most sounds and all music were made for the game. Some card and chip sounds start from recordings in the Casino Audio pack by Kenney (kenney.nl), released under CC0 1.0. Thank you, Kenney.

Open-source software

The app is built with Flutter and other open-source software. The full list of licences is in the app's settings.

Trademarks

Wikipedia is a trademark of the Wikimedia Foundation. Kerura is not endorsed by or affiliated with the Wikimedia Foundation. We use the word "Wikipedia" only to say where the cards come from.