Credits and licences

The games stand on other people’s generous work. Here it is, with the licences it’s shared under.

Maps and countries

• Country outlines: Natural Earth, in the public domain, through world-atlas (ISC License).
• Country facts, capitals, areas and borders: world-countries by Mohammed Le Doze, under the Open Database License 1.0. Our country files at /data/countries.json are derived from it and are offered under the same licence.
• Capital coordinates: Wikidata, under CC0.
• Populations: World Bank, Population, total (SP.POP.TOTL), 2025, under CC BY 4.0. People per km² is our own calculation from these figures and the areas above.
• Flags: flag-icons, under the MIT License.

Languages

• Sentences in Which Language?: Tatoeba, written by its native-speaker contributors and shared under CC BY 2.0 FR. Each sentence links to its page on Tatoeba, with its author. We show them unchanged.
• Words, toasts and cognates are our own lists, checked against Wiktionary.

Facts

The explanations in Flagged, Four Corners, Capital Pairs, Timeline and Fermi are written by us and checked against Wikipedia. If you find a mistake, please tell us at hello@swelis.com.

Type and code

• Typefaces: Gloock by the Gloock Project Authors and Libre Franklin by the Libre Franklin Project Authors, both under the SIL Open Font License 1.1.
• Code: d3-geo and topojson-client (ISC License), and qrcode-generator by Kazuhiko Arase (MIT License).

Country names and borders are shown for play and aren’t a statement on any territorial dispute.