Copyleft is a standard term. https://en.wikipedia.org/wiki/Copyleft
Just because it's used incorrectly doesn't mean it isn't standard. "Ironic" is a standard term and is ironically used incorrectly all the time.
Copyleft is a standard term. https://en.wikipedia.org/wiki/Copyleft
Just because it's used incorrectly doesn't mean it isn't standard. "Ironic" is a standard term and is ironically used incorrectly all the time.