This paper analyses the nature of language and its role in realism-antirealism debate. The aim of the paper is (i) to present and defend the common-sense realism as a position, which enables us to offer a plausible explanation of the evolution of linguistic practice, and (ii) to present the realism-antirealism debate as a battle of an accent. The realists emphasize (a) the source of differentiation, while the antirealists accent the process of differentiation. Both of the aims are met via the conceptual analysis of the main realism-antirealism concepts such as language, differentiation, difference, reality, to constitute (to construct) and by the assessment of the impact that the results of the ab- ovementioned analysis would have on the position of common-sense realism.