Questions and explanations: CC BY-SA 4.0

The questions, options, explanations and taxonomy in this repository
(questions/, taxonomy.json and their generated copies in site/data/)
are by Cristobal Santana and are licensed under the Creative Commons
Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0).

You may share and adapt them, including commercially, as long as you
give appropriate credit, link to the license, indicate if changes were
made, and distribute your contributions under the same license.

Full license text: https://creativecommons.org/licenses/by-sa/4.0/legalcode
Summary: https://creativecommons.org/licenses/by-sa/4.0/

The code (site/, scripts/) is under the MIT License (see LICENSE).
The fonts in site/fonts/ are under the SIL Open Font License 1.1
(see the OFL-*.txt files there).