This paper presents an argument for how second language acquisition (SLA) research should be carried out if a researcher is genuinely interested in learner grammar (i.e., knowledge of language), its acquisition and use. SLA research has expanded greatly over many years and currently spans many subfields, but researchers share one main goal: to…

Immersion programs have long been considered the gold standard for school-based language revitalization, but surprisingly little attention has been paid to the quantity and quality of the input that they provide to young language learners. Drawing on new data from three such programs (Kaqchikel, Western Subanon, and Maori), each with its own…

Over the past several decades, applied linguistics and second language (L2) acquisition and teaching have been areas of prolific research and have undergone continual development. The purpose of this article is to identify essential themes in the field of applied linguistics, focusing more intensely on teaching and learning second languages in a…

This study is a continuation of an ethnographic study of a six-year-old Japanese child learning English as a Second Language. It is concluded that language transfer, overgeneralization, and simplification combined with natural development all worked together in the development of the subject's interlanguage, irrespective of the overwhelming input…