Europe: Natural Earth, public domain. https://www.naturalearthdata.com/about/terms-of-use/
Data: https://github.com/nvkelso/natural-earth-vector/blob/master/geojson/ne_110m_admin_0_countries.geojson
38 countries selected; coordinates rounded and distant territories omitted for this quiz.

Romania: cimi, romania-choropleth. CC BY-SA 3.0 Unported.
https://github.com/cimi/romania-choropleth
https://creativecommons.org/licenses/by-sa/3.0/
Adaptations for Jocgratis.ro: boundary simplification, coordinate rounding, county names with Romanian diacritics, county seats. Adapted romania.json is provided under CC BY-SA 3.0. See romania-LICENSE.txt.

V3 geography additions (prepared 2026-10-05)

cities.json: selected points from the Romania vector datasets at
https://geo-spatial.org/vechi/download/romania-seturi-vectoriale
Authors: Cristian Balint and Vasile Craciunescu; SIRUTA/INS attributes.
Download: https://geo-spatial.org/vechi/file_download/29545
50 urban places selected; names standardized in Romanian, coordinates rounded.

relief.json: Romanian geomorphological units, Bogdan Candrea, Petronela Candrea,
Mihai Daniel Nita (2008), based on Grigore Posea and Lucian Badea (1984).
https://geo-spatial.org/vechi/download/harta-unitati-relief-romania
Download: https://geo-spatial.org/vechi/file_download/24263
13 grouped major units and 8 selected subunits; polygons merged, simplified
and coordinates rounded. Classification boundaries are approximate.
The source site provides a separate reuse permission for downloadable data,
including commercial use and adaptations with source attribution:
https://geo-spatial.org/despre/
This is the data-download permission, separate from the general website CC license.

rivers.json: Natural Earth 1:10m rivers + Europe river supplement, public domain.
https://www.naturalearthdata.com/downloads/10m-physical-vectors/10m-rivers-lake-centerlines/
https://www.naturalearthdata.com/about/terms-of-use/
16 named courses selected; clipped to the Romania-region bounding box and
simplified. Some parts outside Romania are retained for geographic continuity.

world.json: selected national capitals validated against Natural Earth
ne_10m_populated_places_simple, public domain. 52 countries; Romanian labels.
https://github.com/nvkelso/natural-earth-vector
The selection omits states with multiple or recently transitioning capitals.

Flag SVG files: lipis/flag-icons, MIT; the complete license is in
/assets/flags/LICENSE.txt. https://github.com/lipis/flag-icons
The source 4:3 assets are visual representations, not a specification of official
flag proportions. Files are hosted locally and do not call external services.

Original Romanian word banks, crossword clues and educational question text:
prepared for JocGratis. The dictionaries are deliberately limited and visible.