Study abroad program (language teaching) ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; Sprachenwahl; Language choice; Diglossia ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition)