When considering the structure of New Englishes which have evolved in – multilingual, mostly post-colonial – contexts of Asia (thus, Asian Englishes), the significant factors to be considered are: 1) the variety/ies of the English lexifier that entered the local context; 2) the nature of transmission of English to the local population; and 3) the local, i.e. substrate, languages of the community in which the New English emerges. This third factor is the focus of the five papers in this volume: they investigate the structure of Asian varieties of English by exploring the relationship between the typological profile of substrate languages in the specific linguistic ecology and the grammatical features of the emerging contact variety of English.