Schriftlichkeit; Literacy; Literalität; Oralität; Orality/Literacy ; Sprache und Denken; Language and thought; Sprachliches Relativitätsprinzip; Denken und Sprache; Relativity (linguistic) ; Wahrnehmung und Sprache; Perception and language; Sapir-Whorf hypothesis; Linguistic relativity ; Academic achievement; Language and intelligence ; Language and society ; Kulturvergleich; Language and culture ; Sprachenpolitik; Language management; Language politics ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development