Could someone elaborate on the reasons? Clearly translation is going to be one, since the market for any given game is going to be much smaller than the market

Could someone elaborate on the reasons? Clearly translation is going to be one, since the market for any given game is going to be much smaller than the market for most social media sites. I would imagine that cultural norms, e.g. what is acceptable in one country is verboten in another, is a more significant barrier when it exists since it would alter the story or game mechanics. But is there anything else?