Russia ; History of linguistics (19th century) ; History of linguistics (20th century) ; Phylogenese; Language origin ; Sprache und Denken; Language and thought; Sprachliches Relativitätsprinzip; Denken und Sprache; Relativity (linguistic) ; Wahrnehmung und Sprache; Perception and language; Sapir-Whorf hypothesis; Linguistic relativity ; Techniques (in research) ; Research techniques ; Parole