DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Worthäufigkeit; Häufigkeitsliste; Frequency list; Frequency (lex.) ; Word frequency ; Stance (discourse analysis) ; Subjektivität (pragm.) ; Subjectivity (pragm.) ; Speaker attitude ; Interimsgrammatik (Spracherwerb) ; Lernervarietät (Spracherwerb) ; Learner variety (language acquisition) ; Interlanguage (language acquisition) ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Case study (second language acquisition) ; Evidentialität; Evidentiality; Narrativ; Narrative; Renarrativ; Quotativ; Quotative; Reportativ; Putativ; Putative; Präsumptiv; Presumptive; Source of information; Source of knowledge; Epistemic modality ; Argumentative discourse