Say I'm writing a story about people on another planet. None of them has ever seen (for example) a snake, and there's no mention of snakes or a direct equivalent in their history. The concept of a snake just doesn't exist for them. The story moves between three characters in close third person.
An alien creature has turned up that somewhat resembles a snake. In this situation, is it reasonable to mention a snake when describing it? I think it isn't, strictly speaking, as the close third person POV means that the description is coming "through" the characters. On the other hand, it might not be sufficiently jarring to matter. I'd be interested to know what others think about this.
Hi! Well, neither the characters nor the narrator may know what a snake is, but they do know the concept of a reptile, under which a snake would be a long, tubular-shaped reptile; a crocodile a four-legged reptile with teeth and considerable affection for ferocity and for eating people. A dragon, then, would be a four-legged reptile with bad breath, a sulfur odor and good for lighting bonfires, and yes, people too.
Well, it basically depends on how you design your world. The characters in my saga, for example, given that they have a terrestrial origin, they are a colony, they allow my narrator to avoid all these semantic doubts at the time of descriptions precisely because, even more strange a world and a culture of their origin terrestrial, in general increases this problem of cultural association and therefore the work of the narrator is difficult. But also, for example in my history, there are areas where its inhabitants do not even know what bread is or the mayonnaise or a lot of fruits than in areas just distant barely about 600 kms. yes they are known. Some don't know the beer, hell. In the same way, Jesus Christ (because some church remains, something of the religion managed to pass through the colonial fleets) they call "INRI" and, of course, they do not know that it is actually an acronym. In other words, I use the ignorance of my characters as a narrative element that I even take advantage of. But, as I was saying, it all depends on the way you design your world. The closer to home, the easier it is to show what was lost along the way and that includes the culture, of course.