👉 A subdialect is a dialect or variation of a language that has its roots in another language but is distinct from it. It can be defined as a dialect whose vocabulary, grammar, and pronunciation are different from the standard form of the language. The term "subdialect" was introduced by linguist Charles Sanders Peirce in his work on the structure of languages. He proposed that subdialects could exist independently of each other, but were not mutually exclusive or interchangeable with each other