Brazil ; DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Strategie (Lerntheorie) ; Strategy (learning theory) ; Learning strategy ; Second language acquisition (psycholing.) ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Auslandsdeutsch; Deutsch im Ausland; German abroad; Other varieties of German