Ethnopragmatik; Ethnopragmatics; Culture-specific communication ; Restaurant; Business communication; Notruf; Emergency call; Service encounter ; Mobile radio; Mobilfunk; Walkie-talkie; Voice over IP; IP-Telefonie; Telephone (language behavior) ; Sprachenpolitik; Language management; Language politics ; English as international medium ; Dispositivanalyse; Dispositive analysis; Critical discourse analysis ; India (English language in) ; Indien (engl. Sprache in) ; English in India