This chapter examines segmental mutations and processes in Taiwanese Southern Min (TSM), including assimilation, dissimilation, gemination, syllabic reduction, contraction, and vernacular-literary phonological differences.

Assimilation occurs in place (e.g., homorganic nasal assimilation, optional palatalization) and manner (e.g., nasal harmony). Dissimilation prevents adjacent identical [back] features in diphthongs and avoids co-occurrence of [labial] and [dorsal] features in onset glides and coda consonants.

Gemination lengthens glides, nasals, and stops. Stop codas of checked syllables are voiced and undergo gemination when followed by a vowel-initial function word; otherwise, they undergo final devoicing. Gemination is constrained to the prosodic word domain, and the chapter suggests a gradient interpretation of geminate inalterability in some systems.

Syllable reduction leads to contraction, with nuclear segments potentially undergoing transformations like devocalization, merger, or nasalization. Contraction follows an edge-in paradigm, with sonority-based priority.

Vernacular-literary differences include onset consonants in the literary register undergoing pharyngealization and velarization, and vowels alternating through rounding and derounding, reflecting a trend toward unmarked phonological structures.

This chapter reviews evidence that the orthographic forms (spellings) of L2 sounds and words affect L2 phonological representation and processing. Orthographic effects are found in speech perception, speech production, phonological awareness, and the learning of words and sounds. Orthographic forms facilitate L2 speakers/listeners – for instance in lexical learning – but also have negative effects, resulting in sound additions, deletions, and substitutions. This happens because L2 speakers’ L2 orthographic knowledge differs from the actual working of the L2 writing system. Orthographic effects are established after little exposure to orthographic forms, are persistent, can be reinforced by factors other than orthography, including spoken input, and are modulated by individual-level and sound/word-level variables. Future research should address gaps in current knowledge, for instance investigating the effects of teaching interventions, and aim at producing a coherent framework.

The chapter begins with an overview of current Hausa phonology. It then provides a picture of what existed in ‘Old Hausa’ and the subsequent changes that took place, many due to regular sound laws such as Klingenheben’s Law, the Law of Codas in Reduplication, loss of word-final nasals, and the change of non-initial /r/ into /y/. Although sporadic, historical metathesis was much more common than one usually finds in diachronic change. Glottal stop and /h/ are newly introduced phonemes, resulting from the addition of onsets to vowel-initial words. The high frequency glottalized semivowel /’y/ is also a new phoneme resulting from the fusion of /?/ + /y/. Gemination was originally absent but appeared later and became common through phonological and morphological means. Vowels developed from a skewed 2-3-5 (initial-medial-final) system, with vowel length only distinctive medially, into a system with five vowels, all of which now occur long and short. Starting with two level tones, Hausa later developed Falling and Rising contours, the latter having simplified to High. The loss of vowels resulted in the existence of lexical floating tones not underlyingly attached to segments.

This chapter provides a typological overview of segmental quantity in Germanic languages. It begins with an overview of basic terminology, different ways of representing quantity, and the effects of different diachronic processes (e.g., open syllable lengthening and degemination) on the occurrence of contrastive segmental quantity. After a presentation of Riad’s (1995) typology of quantity, the chapter describes North and West Germanic language varieties that preserve both vowel and consonant quantity, varieties that retain only consonant quantity and varieties that retain only vowel quantity. Also included are discussions of complementary quantity, syllable cut and evidence that some Germanic varieties no longer have contrastive segmental quantity.