This book consolidates earlier insights and proposes a model of contact linguistics and an innovative approach to the study of bilingualism. It explores the nature of major language contact phenomena, especially lexical borrowing, mixed languages, bilingual lexical and grammatical processing and representations, second language acquisition, codeswitching, and interlanguage. It examines the universal principles governing grammatical structures of languages in contact and differentiates the lexical and grammatical features of morphemes as outcomes of language contact. The proposed approach describes and explains some outstanding linguistic aspects of bilingualism with a focus on the mechanisms of the bilingual mind during bilingual processing and production at several levels of abstract lexical structure. Abundant naturally occurring examples support the claim that the languages in contact are never equally activated and that language-specific abstract entries in the bilingual mental lexicon are in contact, resulting in mutual influence during codeswitching, second language learning, and interlanguage development.
