MediaWiki:Licenses

• Unknown_copyright|I don't know exactly
• Explicit permission|The author of this work gave us explicit permission to use it
• Free licenses:
  • PD|PD: public domain
  • CC-by-nc-sa-4.0+CC-by-sa-4.0|Creative Commons Attribution NonCommercial ShareAlike 4.0 International as well as Creative Commons Attribution ShareAlike 4.0 International (Standard)
  • CC-by-nc-sa-4.0|Creative Commons Attribution NonCommercial ShareAlike 4.0 International
  • CC-by-sa-4.0|Creative Commons Attribution ShareAlike 4.0 International
  • CC-by-4.0|Creative Commons Attribution 4.0 International