An idiolect's a variety of a language unique to an individual. It's manifested by patterns of word selection, vocabulary and word lexicon, grammar, or words, phrases, idioms, or pronunciations that're unique to that individual. Every individual has an idiolect; the grouping of words and phrases's unique, rather than an individual using specific words that nobody else uses. An idiolect can easily evolve into an ecolect—a dialect variant specific to a household. History Forensic linguists ca… (More on Idiolect)