DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Instruction (medium of) ; Medium of instruction ; Wortschatz (Sprachunterricht) ; Lernwortschatz; Vocabulary teaching ; Neologismus; Neology (lex.) ; Neology (technical language) ; Substantivkompositum; Compound noun; Nominal compound ; Linking element ; German