Games on the SNES weren't region locked per se, in fact the hardware between the Japanese and NA versions were exactly the same if memory serves. It was actually the shape of the cartridges that prevented you from playing them in different regions. For example you couldn't fit an NA SNES game into a Super Famicom and visa versa. You technically could fit a Super Famicom game into a Super Nintendo by breaking two tabs inside the cartridge slot but that would require maiming your console. Unfortunately such and easy fix isn't available for the PAL region or Japanese consoles. :)

Thanks for including me in your Gaming's Daily post as well!! I appreciate the mention and support!