Applied linguistics ; English as a second language; ESL; TESOL ; Validity (method.) ; Evaluation criterion (method.) ; Equivocation (pragm.) ; Ambiguity (pragm.) ; Co-construction (communication research) ; Alignment (communication research) ; Cooperative activity (communication research) ; Vagueness (communication research) ; Explicitness (communication research) ; Implicitness (communication research) ; Uncertainty (communication research) ; Auswanderer; Emigrants; Migrant; Aussiedler; Gastarbeiter; Arbeitsmigranten; Immigrants/Emigrants ; Social constructionism; Sozialkonstruktivismus; Constructivism (philosophy) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English
