Lehrbuch; Arbeitsbuch; Course book; Textbook; Workbook; Übungsbuch; Introductions (to linguistics) ; Altertum (Sprachtheorie) ; Antiquity (theory of language) ; Nominalism ; UG; Universal grammar ; Chinesisches Zimmer; Chinese room; Intentionality ; Language of thought ; Sprache und Denken; Language and thought; Sprachliches Relativitätsprinzip; Denken und Sprache; Relativity (linguistic) ; Wahrnehmung und Sprache; Perception and language; Sapir-Whorf hypothesis; Linguistic relativity ; Sprache und Denken; Erkenntnis und Sprache; Language and thought; Erkenntnistheorie; Epistemology and language; Language and epistemology ; Regel (pragm.) ; Rule (pragm.) ; Conventionality (pragm.) ; Philosophy of language ; Universalien (Philosophie) ; Universals (philosophy) ; Essentialismus; Essentialism; Aktualismus; Actualism; Ontology ; Universal language (philosophy) ; Arbitrariness ; Referential semantics