Asiento trasero
Yes, Seat is the Spanish branch of the Fiat car company.
tiene su espalda
Papá ha regresado
Estoy de vuelta (correct) Ya volvi ( how folks say)
Vuelto [Masciline] or Vuelva [Feminine]
echate una caca
I sleep on my back in Spanish is: Yo duermo de espaldas.
Devuelvaselo
Me retracto
we say: necesito que vuelvas
A leopard.
If you mean your back as in the part of your anatomy, the spanish word is "espalda" (S-paul-dah)
Yes, Seat is the Spanish branch of the Fiat car company.
Devuelve eso
no a mis espaldas
tiene su espalda
It's "Regresa a mi"