adamic language aerospace african grey parrot american sign language ancient greek angular gyrus animal communication animal language applied linguistics arabic language arbitrary articulatory phonetics artistic language august schleicher biology bosnian language charles darwin chimpanzee co-evolution communication computer science consonant constructed language controlled natural language croatian language cuckoo culture dialect dialect continuum discourse analysis dutch language english language esperanto ethnologue extinct language ferdinand de saussure formal grammar formal language formal system george soros german language gorilla grammar great ape language history of linguistics ido india interaction interlingua interlingua-english dictionary international auxiliary language john locke karl von frisch klingon language education language family language policy language reform language school latin linguistics list of official languages literary criticism literary theory logos lojban markup language mathematics merlin donald metacommunicative competence middle east mikhail bakhtin mimesis modern language morpheme native esperanto speakers natural language novial occidental language official language orangutan origin of language parrot persian empire phenomenon philology philosophy of language phone phoneme phonetic transcription phonetics phonology phrase population principles of neural science programming language proto-language reason roman jakobson science second language second language acquisition semantics serbian language sibawayh simplified english slovene language spanish language speech perception symbol symbolic communication symbolic linguistic representation syntax systematic tamil language terrence deacon theoretical linguistics thomas hobbes tongue translation universal grammar vowel whistled language word word game written language