"Haste Arco Cielto Lindo"
this is a motto found on an old mexican blade made by RS Aragon in Oaxaco before the 1900's. It would have something to do with what the blade or user of the blade could do Haste Arco Cielto Lindo.
Arco> arcoiris, Cielito Lindo>little beautiful sky. It means that becomes in something even better. About the blade it might mean "I trust in this blade, I trust it can defend me, I trust it can save me, I trust it can make me powerful".