Just Eat let an AI make menu photos for restaurants that didn't have any, and it showed customers a bowl of baby tigers in garlic sauce. The dish was tiger prawns. It also turned a baked potato into a puffer jacket covered in potatoes. All of it traces back to a grammar rule you've been using since you were five and have never once noticed. In Britain a baked potato is called a jacket potato, and every kid over there knows it's a potato. That's because English puts the real thing at the end…