Needs assessment (language teaching) ; Educational policy ; Sprachenwahl; Language choice; Diglossia ; Dreisprachige Erziehung; Trilingual education; Multilingual education ; Hochsprache; Schriftsprache; Acrolect; Standard language ; Switzerland (German language in) ; Schweiz (dt. Sprache in der) ; Deutsch in der Schweiz; German in Switzerland; Swiss German