Dialect levelling

Serbo-Croatian, also known as Bosnian-Croatian-Montenegrin-Serbian (BCMS), is a Western South Slavic language and the primary language of Serbia, Croatia, Bosnia and Herzegovina, and Montenegro. It is a pluricentric language with four mutually intelligible standard varieties, namely Serbian, Croatian, Bosnian, and Montenegrin.

consciously acquired accent of English, intended to blend together the "standard" speech of both American English and British Received Pronunciation

the means by which dialect differences decrease

regional varieties of the Italian language, influenced by the languages of Italy

group of dialects of the Polish language