While earlier scholarship has tended to emphasize the "purity" of English, it has increasingly been recognized that language contact is ubiquitous and has shaped the character of modern English in decisive ways. I have focused on contact effects in English in a range of contexts and publications. Obviously, this research activity is closely intertwined with my other projects on evolutionary processes in World Englishes, Earlier African American English, Caribbean creoles and semi-creolization, ELF, and others (given that in all of these contexts contact manifestations play a major role).
Schneider, Edgar W. "Contact Englishes and Creoles in the Caribbean." In Raymond Hickey, ed., Handbook of Language Contact. Malden: Blackwell 2010, 478-497.
Schneider, Edgar W. "Contact-induced change in English world-wide." In Terttu Nevalainen and Elizabeth Closs Traugott, eds., The Oxford Handbook of the History of English. New York: Oxford University Press 2012, 572-581.
Schneider, Edgar W. "Hybrid Englishes: An exploratory survey." World Englishes 2016. DOI: 10.1111/weng.12204
Schneider, Edgar W. "Focus on language contact". In Laurel Brinton, ed. English Historical Linguistics: Perspectives and Approaches. Cambridge: Cambridge University Press fc. 2016.