Writers often overuse a few unique words, creating a linguistic fingerprint. Vocabulary words are also exchanged between social groups. Some people contribute new words, while others adopt them. The process is not entirely random, though:
Diana Boxer, a professor at the University of Florida who specializes in sociolinguistics, says that when we find ourselves in a situation where someone uses language differently than we do, or words we’re unfamiliar with, we usually respond in one of two ways.