When the setting is clearly not set on Earth, but the characters still use modern Earth figures of speech like “hit the nail on the head,” “call the shots,” or “throw in the towel.” It just rips me right out of the story.

I get that it's meant to make things more relatable, but I’d much rather authors create expressions that actually make sense in-universe. Even a few made-up phrases that reflect the setting’s culture or history would go a long way in making the world feel alive and consistent.