The author discerns two main types within the field of cognitive differentiation of language - extroverted and introverted type. In all types of introverted differentiation of language there are different types of expressivity, which he refers to as differentiating-lectal expressivity. This paper shortly presents its basic aspects and types. Expressivity, in general, is divided into internal and external. Internal expressivity creates its own types of differentiating-lectal structuring of language. Each of those types has its own expressivity: one - functional style, two - dialect, three - jargon, four - women language as opposed to men language, five - language of the young etc. Thus, expressivity is not only a phenomenon of stylistic differentiation of language but also universal occurrence.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.