Discourse analysis (pragm.) ; Diskursgrammatik; Gesprächsanalyse; Konversationsgrammatik; Conversational analysis (pragm.) ; Norm of interaction; Regel (pragm.) ; Rule (pragm.) ; Interactional norm ; Gesprächsstil; Conversational style ; Cross-cultural pragmatics; Pragmatics, cross-cultural; Pragmatik, interkulturelle; Intercultural communication ; Communication research ; Ethnopragmatik; Ethnopragmatics; Culture-specific communication ; Kommunikation, missglückte; Nichtverstehen; Failed communication; Noncomprehension; Miscommunication; Communication failure ; German Democratic Republic (language use) ; Germany (language use) ; Wiedervereinigung, deutsche; Wende; German reunification ; Register (sociolinguistics) ; Language and society ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; German