Prescriptive, adj. That prescribes or directs; giving definite, predise directions or instructions.In later user, in Lingüistics: that

lays down rules of usage.

interlanguage, n. Add. 2.Lingüistics. A lingüistic system typically developed by a student before acquiring fluency in a foreign

language, and containing elements of both his or her native tongue and of the target languge.

uniformity, The state or quality of being uniform;overall sameness, homogenety, or regularity; uniformity of style.

variability, having much variation or diversity.

dichotomy, n. Division of a whole into two parts. Division of a class or genus into two lower mutually exclusive classes;binary

classification.