This book explores the current state of Spanish sociolinguistics and its contribution to theories of language variation and change, from both synchronic and diachronic perspectives. It offers original analyses on a variety of topics across a wide spectrum of linguistic subfields from different formal, experimental, and corpus-based standpoints. The volume is organized around six thematic sections: (i) Cutting-edge Methodologies in Sociolinguistics; (ii) Bilingualism; (iii) Language Acquisition; (iv) Phonological Variation; (v) Morpho-Syntactic Variation; and (vi) Lexical Variation. As a...