Topics: Language, Linguistics, Language-behaviour, Language-systems, speech, branches of linguistics, sounds of language, phonic medium, phonetic representation, orthographic representation, articulatory phonetics, phonemes, allophones, suprasegmental phonology, phonological structure, grammar, syntax, inflection, morphology, grammaticality, productivity, parts of speech, form-classes, grammatical categories, generative grammar, sematics, lexical meaning, denotation, grammar, sentence-meaning, utterance-meaning, language-change, historical linguistics, language-families, historicism, structuralism, functionalism, generativism, universal grammar, mentalism, rationalism, innateness, language acquisition, sociolinguistics, ethnolinguistics, psycholinguistics, accent, dialect, idiolect, vernaculars, bilingualism, code-switching, diglossia, stylistic variation, stylistics, culture, cultural overlap, cultural diffusion, translatability