I’ve heard “a diestra y siniestra” in Spanish which means left and right but it’s Latin and left in Spanish is actually izquierda which doesn’t have clear etymology. Most popular theory is that it comes from Basque language and somehow substituted ‘siniestra’ at some point but it’s contested. It’s mostly agreed it comes from some language that predated Romans and Latin, probably from Pyrenees but no one knows which language that was for sure.