OEからMEへの変化 simplification
[1] the regularisation of irregularities
[2] an increase in lexical and morphological transparency
[3] the loss of redundancy
dialect-contact-induced simplification: regularisation occurs, and unmarked forms are selected or developed. But they do not extend to wholesale loss of morphology such as occurred in the transition from OE to ME.
language contact: pidgins and creoles, simplification
Trudgil, P. (2010) Investigations in Sociohistorical Linguistics: Stories of Colonisation and Contact, Cambridge.
