Your biggest issue here is that North American SNES consoles were different in design to Japanese and European ones- the cartridges are physically incompatible.
On top of that, the PAL region cartridges (mostly European) have internal chips making them incompatible with US and Japanese systems. Get past that, and you tended to get an inferior experience trying to play a non-PAL game on a PAL tv set.
So, short answer- yes, just not on the same principle that region locking applies today.