Language testing ; Evaluation criterion (language testing) ; Evaluation criterion (language teaching) ; GERS; CEFR; Quadro Comune Europeo di Riferimento; Common European Framework of Reference for Languages ; Sampling; Language corpus; Sprachkorpus; Datensammlung; Data collection; Textkorpus (method.) ; Text corpus (method.) ; Corpus linguistics ; Bokmål; Nynorsk; Norwegian