T.A.
Hi L.
I wanted to have a baby sitter who spoke fluent spanish only to hel pme raise my son, but never did and he's 19 now. But you still have time. I would say have a sitter that will only speak spanish and that way they will be forced to learn. Their brains are still forming and able to learn easily. It's when they are 9 or 10 and up that their minds don't learn so easily. But I would only speak spanish when you're with them alone, and then when dad is there, you can swap back maybe. Good luck