Got the idea from this pic
https://www.furaffinity.net/view/38075500/
My idea is a powerful magic spell goes wrong and the human world and Equestria are fused together and the magic has a strange effect on the humans causing them to lose bladder and bowel control and creating a language barrier causing the human to sound like that baby babbling to the ponies.
because of this the ponies think humans are babies of another world and begin adopting them and treating them as babies of their own.
one boy is adopted by Princess Twilight who tries to convince her he's not a baby but has a hard time convincing her.
I'd like to be the boy I'd like someone to be Twilight (let's say for the RP she doesn't know what a human is) and was thinking it would be Twilight from the very end of the show unless you don't want it to be.
thinking she'd try teaching him a lot like ABC's and how to read speak or about Equestria maybe through this learns to speak again to tell her he's not a baby at some point.
Another idea is Queen Chrysalis tries summoning a baby human to but summons a Older human but doesn't realize he's not a baby and babies him thinking by raising a baby she can make them love her so she can feed off the love.
I'd like someone to be Queen Chrysalis.
so anyone interested?