Derived from File:BlankMap-World-Microstates.svg, File:ESON.png and http://www.eso.org/public/france/outreach/partnerships/eson/ . Blue: member states; red: ESO host; purple: ESO member state and host; green: additional ESON members; yellow: at least one language supported.
Own work
Adrien Coffinet, dit SenseiAC