Modern Scots comprises the varieties of Scots traditionally spoken in Lowland Scotland and parts of Ulster, from 1700. Throughout its history, Modern Scots has been undergoing a process of language attrition, whereby successive generations of speakers have adopted more and more features from English, largely from the colloquial register. This process of language contact or dialectisation under English has accelerated rapidly since widespread access to mass media in English, and increased population mobility became available after the Second World War. It has recently taken on the nature of wholesale language shift towards Scottish English, sometimes also termed language change, convergence or merger.