MediaWiki:Licenses

   Unknown_copyright|I don't know exactly
   Free licenses:
       PD|PD: public domain
       cc-by-sa-3.0|Creative Commons Attribution-Share Alike 4.0
       cc-by-sa-4.0|Creative Commons Attribution-Share Alike 4.0
       cc-by-4.0|Creative Commons Attribution 4.0
       GFDL|GFDL: GNU Free Documentation License
       GPL|GPL: GNU General Public License
       LGPL|LGPL: GNU Lesser General Public License