I'm in the process of building a fantasy world from the ground up, and I'm trying to create languages for certain regions of the world. How would I go about building these languages while making them distinct from each other, while also avoiding appropriating obvious elements or words from real languages? Is it better to build a set of grammar rules for consistency or go just bare bones enough that the few sentences an elf speaks in their native tongue don't contradict each other? Would geography have any actual effect on the language? Any advice is greatly appreciated!