Random factoid: Way back in the early PlayStation days, the O button was the default “accept/enter” buton, and the X was the “cancel/back” button, because that aligned with the national consensus of O = correct/confirm, and X = incorrect/cancel in Japan. But when the console was introduced in North America and Europe, they started remapping the X and O to align with other western consoles using X, like the Xbox. That said, I distinctly remember early PS1 games being a sort of wild west of which button would be confirm, so I suspect it was also done in response to western gamers struggling to adapt.