Biographien; Biographies ; History of linguistics (20th century) ; History of linguistics (21st century) ; Evaluation criterion (language teaching) ; GERS; CEFR; Quadro Comune Europeo di Riferimento; Common European Framework of Reference for Languages ; Glottodidaktik; Lehrforschung; Pädagogische Linguistik; Pedagogical linguistics; Language teaching research ; Terminology (linguistic) ; Validity (method.) ; Evaluation criterion (method.) ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness