My first fantasy novel is not a historical fantasy, and though similar, the planet is unlike Earth. It is set in a pre-technological era (if ever the civilization develops technology). I would like to know how much freedom I should exercise in my worldbuilding.

I'm not saying I'll go in and create something to drink from called dtyhujikol, and the characters will ride in srfdghuj instead of carriages or whatever, and my readers will be left confused, but since I am not following a setting of a specific era. I would like to mix thing up from different eras and maybe invent a few things of my own without going overboard. Most fantasies I have read had been set or based on a specific era.