History of linguistics (20th century) ; Mother tongue (teaching of) ; Sprache und Denken; Language and thought; Sprachliches Relativitätsprinzip; Denken und Sprache; Relativity (linguistic) ; Wahrnehmung und Sprache; Perception and language; Sapir-Whorf hypothesis; Linguistic relativity ; Community language; Netzwerk (Soziolinguistik) ; Network (sociolinguistics) ; Speech community ; Lexical field ; German
