My Peruvian husband and I are struggling with the inheritance laws in Peru too, so we have each a will here and each one in the USA when we ever move back to TX. Peru and Louisiana use Napoleanic law, almost identical rules for each. You do need a will here, believe me, even though the will is only valid if it follows the Peruvian laws. My father-in-law's will was not valid (not written by our family lawyer, Teresa Corbera) and it was complicated with a daughter out of marriage (deceased with 4 living kids), and the succession was only completed after more than 6 years.
Our wills follow Peru laws. We have each 2 kids. If one spouse dies, the living spouse only gets usury rights and children get ownership of the deceased spouse's 50%. This includes any assets. The deceased 50% of cash is divided between the living spouse and the children. If the living spouse sells any assets, including the home, 50% of asset value is divided among the kids, nothing for the living spouse. Crazy, but it is the same in LA. My mother just passed away there and my dad is stunned because his lawyer allowed their wills to show all goes to the living spouse. See a lawyer. I can recommend Teresa Corbera, in San Borja, who my family here has used for almost 20 years. She speaks English, too.
We are about to sell our home we just finished building, in San Andres south of Lima, because of this Napoleanic law in Peru. We learned the law after we purchased land and were in the middle of building.