Colorín, Colorado, este cuento se ha acabado is a Spanish phrase used to indicate that a story has reached its end. The first part is just nonsense, the second part means 'this story is over.'
We use a similar phrase in Tamil, கதை முடிந்தது கத்திரிக்காய் காச்சத்து. It means, literally, 'the story is over, the eggplant is ripe'.
Is there an equivalent, semi-nonsensical phrase in English used by storytellers to tell their listeners that the story is over?
I can't think of anything besides the not-always-applicable ...and they all lived happily ever after, which isn't nonsensical, and I couldn't find any useful translations of the Spanish phrase anywhere online either.