Are you allowed to trade villagers to the procreate deck with the trade task?
If so, could you trade your elder or founder for a different villager?
Founder, no. He stays with the village he started in.
Elder, no. When cards are Traded they need to go in the same deck (using the card back as the category) and there is no deck with the elder backs in play.
For example, if you have a Resource, but from the Advanced Cultures deck (not the original game) then you would trade with the Forage deck, not the Gather deck.