Multilingualism; Polylingualism; Plurilingualism ; Language planning; Purification of language; Sprachpurismus; Sprachverfall; Language decay; Language cultivation ; Switzerland (German language in) ; Schweiz (dt. Sprache in der) ; Deutsch in der Schweiz; German in Switzerland; Swiss German ; Schweiz (fr. Sprache in der) ; Switzerland (French language in) ; French in Switzerland ; Schweiz (it. Sprache in der) ; Switzerland (Italian language in) ; Italian in Switzerland ; Rhaeto-Romance
