Thank you all for the advice about not taking plants into Spain.
Brian,
Over 99% of variegation is a result of mutation, usually cause by the sun and additives in the soil. I have been breeding hostas for over 20 years, and I know that about this same percentage of variegated hostas is a result of multiple mutations. In the hostas world, if a hosta mutates, the mutation needs to grow separately from the mother plant to help it stay mutated.
With the variegated Kwanso, remove the green fans and feed them to the chickens and turkeys. And every time there is a green fan, remove it.