Lehrbuch; Arbeitsbuch; Course book; Textbook; Workbook; Übungsbuch; Introductions (to linguistics) ; Sprache und Denken; Language and thought; Sprachliches Relativitätsprinzip; Denken und Sprache; Relativity (linguistic) ; Wahrnehmung und Sprache; Perception and language; Sapir-Whorf hypothesis; Linguistic relativity ; Cross-cultural pragmatics; Pragmatics, cross-cultural; Pragmatik, interkulturelle; Intercultural communication ; Misunderstanding ; Occupational language behavior ; Family communication ; Unternehmenskommunikation; Business communication; Organizational communication ; Classroom communication; Instructional communication ; Cultural semiotics ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; Kulturvergleich; Language and culture