This book compiles original studies investigating crosslinguistic child phonological development in typical and atypical settings, that is, protolanguage phonology. The chapters address topics and issues not widely or exhaustively reported in the literature, such as research on under-represented languages and foci of interest, as well as information that has remained little-known to the field. It documents recent developments on typically developing populations, and atypical developmental speech in children with autism, developmental language disorder affecting speech, childhood apraxia of speech, phonological assessment and intervention, phonological awareness in (a)typical contexts affecting literacy, and motor speech analysis in speech sound disorders. The book will be of interest to linguists and academic researchers, as well as postgraduate students who are investigating child language acquisition in monolingual settings.

This edited book is a collection of studies on protolanguage phonology, referring to the development of children's autonomous linguistic systems from their first meaningful forms to complete cognitive and articulatory acquisition of language. The volume comprises chapters on child bilingual phonological development, understood as the acquisition or use of more than one linguistic code, whether actual languages, dialects, or communication modes, in an array of contexts. Such contexts include endogenous and exogenous bilingualism, heritage language, bilectalism, trilingualism, and typical and atypical use. The contributed works here will be of interest to researchers and postgraduate students investigating language acquisition in bi-/multilingual settings, as well as those working on child phonological development across a variety of languages.

This book presents diverse, original research studies on typical and atypical child language acquisition in monolingual, bilingual and bi-dialectal settings, with a focus on development, assessment and research methodology. Languages investigated in the studies include underrepresented languages, such as Farsi, Greek, Icelandic, isiXhosa, Maltese, Mandarin and Slovene, without excluding representative work in major languages like English and Spanish. The language areas of focus are phonology, lexicon, morphology and syntax and the book incorporates studies in under-researched language impairment, such as Obstructive Sleep Apnea Syndrome and language impairment in 22q11.2 Deletion Syndrome. The book has practical significance in that it proposes tools and assessment practices that are of universal crosslinguistic relevance while also dealing with language-specific complications. The studies presented enhance existing knowledge and stimulate answers on what the acquisition of disparate languages in different contexts can teach us about language/communication development in the presence or absence of disorder.

Phonemic awareness and phonetic skill are the backbones of phonological theory. In phonological acquisition, the presence or lack of the former crucially determines the outcome of the latter. This inescapably becomes a common thread that interweaves developmental phonology in both childhood and adulthood. Child and adult-learner speech in the course of development constitute separate linguistic systems in their own right: they are intermediate states whose endpoint is, or ought to be, mastery of targeted speech either in a first or a second language. These intermediate states form the theme of the proposed book that introduces the term protolanguage (to refer to child language in development) and juxtaposes it with interlanguage (to refer to language development in adulthood). Though major languages like English and Spanish are not excluded, there is an emphasis in the book on under-reported languages: monolingual Hungarian and Swedish and bilingual combinations, like Greek-English and German-English. There is also an emphasis on under-represented studies in IL: L2 German from L1 French; L2 English from Catalan and Portuguese; and in dialectal acquisition of Ecuadorian Spanish from Andalusian speakers. This volume brings together different methodological approaches with a stress on both phonetic and phonological analysis. The volume has a focus on links between developmental perspectives in protolanguage (introduced in a specific way here) and interlanguage (typically associated with second language development in the post-critical-period). Its strengths are that it includes: both child and adult developmental perspectives; studies on less-researched languages and combinations of languages; descriptive and/or theoretical results from a combination of methodological approaches (e.g. single-case, cross-sectional; spontaneous speech samples, narrative retells); a consideration of speech acquisition in the general context of language. The central theme underpinning the volume is hoped to motivate a shift in the general tendency among researchers to specialize in language subfields (L1 acquisition; L2 acquisition, bilingualism; typical/atypical language) of what is actually one common linguistic domain, i.e. the study of speech sounds (phonology/phonetics).