Topics: four phyla, Phonetics, phonology, Nasal processes, clicks, Syllable structure, Vowel harmony, Consonant alternation, tone, Morphology, Non-concatenative morphology, Noun class system, Verbal morphology, Verb extensions, argument structure, Syntax, semantics, Ideophones, negation, Predicate structure, Movement, Verb focus, predicate clefting, Serial verbs, Agreement phenomena, Consecutive tense, switch reference, Logophoricity, Language typology, historical linguistics, Diachronic typology, grammaticalization, Linguistics, archaeology, Language contact phenomena, Pidgins, creoles

Topics: Sociolinguistics, Sociolinguistic Differences, Speech Communities, Speech Acts, Speech Events, Dialects, Idiolects, Sociolects, Code Mixing, Code Switching, Register, Style, Pidgins, Pidginisation, Creoles, Creolization, slangs, clichés, Taboos, Profane Usage, Monolingualism, Bilingualism, Language Contact, Multilingualism, Diglossia, Polyglottism, Language Ideology, Sociolinguistic Variation, language determinants

Topics: Sociolinguistics, language demography, language varieties, language variation, Sociophonology, dialect, Communication Media sociolinguistics, spoken language, written language, Diglossia, code-switching, Language Contact, Language Generation, Pidgins, Creoles, Language Conflict, Multilingualism, Global Scale Sociolinguistics, Linguistic Etiquette, Bilingual Education, Sociolinguistics, language planning, language reform