Purpose: Insights from linguistic variation research illustrate a linguistically diverse population, in which even speakers who can be classified as speaking a "mainstream" variety have grammatical knowledge of vernacular or "nonmainstream" features. However, there is a gap in our knowledge regarding how vernacular features are…

Language documentation efforts are most often concerned with the adult language and usually do not include the language used by and with children. Essential parts of the natural linguistic behaviour of communities thus remain undocumented, and a growing body of literature explores what language documentation, language maintenance, and language…

The present article provides an exploration of ultimate attainment in second language (L2) and its limitations. It is argued that the question of maturational constraints can best be investigated when the reference population is bilingual and exposed on a regular basis to varieties of their first language (L1) that show cross-linguistic influence.…

This article outlines an emergentist account whereby the limited end-state typical of adult second language learners results from dynamic cycles of language use, language change, language perception, and language learning in the interactions of members of language communities. In summary, the major processes are: 1. "Usage leads to change": High…