Abstract
This chapter investigates the persistence and development of so-called dialect roots, that is, features of local forms of British English that are transplanted to overseas territories. It discusses dialect input and the survival of features, independent developments within overseas communities, including realignments of features in the dialect inputs, as well as contact phenomena when English speakers interact with those of other dialects and languages. The diagnostic value of these roots is exemplified with selected cases from around the world (Newfoundland English, Liberian English, Caribbean Englishes), which are assessed with reference to the archaic/dynamic character of individual features in new-dialect formation and language-contact scenarios.