Traditional Visayan swords I've known are commonly lineal folded steel that has been welded for homogeneity and usually edge-hardened (occasionally spring tempered). Temper lines vary considerably, but stop at or often short of the unsharp shaft at the base of the blade. However, I have seen some (old) ones with inlaid/scarf-welded edges, and currently have a nice big talibon/garab that though I haven't etched it, and may well not, seems to exhibit such. So, yes, they are laminated, though it may depend on what you mean by laminated, and seems to vary with time, if nothing else.
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