Kode (Kommunikationsforschung) ; Speech codes theory; Accommodation theory (communication research) ; Code (communication research) ; Restaurant; Business communication; Notruf; Emergency call; Service encounter ; Mobile radio; Mobilfunk; Walkie-talkie; Voice over IP; IP-Telefonie; Telephone (language behavior) ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; Voice register ; Other varieties of English