Just because it’s called the same, doesn’t mean it generally is. In Germany we have something called “Scheuermilch”, which literally translates into “abrasion milk”. The only property it shares with milk or even plant-milk is its colour. It’s a cleaning product. You could of course define milk more broadly as “white liquid”…
Fun fact on the side: almond milk & co. are not allowed to be called milk on the packaging in germany. They’re usually called something along the lines of “almond drink”. Reason being because it might confuse the buyer. Scheuermilch is still allowed to be called Scheuermilch though and coconut milk is still coconut milk. So according to our government, apparently, milk can be any white liquid unless it’s a plant based substitute for cow milk. Then it’s something entirely different.