Einfluss von Sprachen aufeinander; Sprachberührung; Areallinguistik; Languages in contact ; Transfer (languages in contact) ; Adstratum language; Adstratsprache; Interference ; Dialektgrenze; Dialect boundary; Linguistic frontier ; Interference (morph.) ; Switzerland (German language in) ; Schweiz (dt. Sprache in der) ; Deutsch in der Schweiz; German in Switzerland; Swiss German ; Arpitan; Franco Provençal ; Schweiz (fr. Sprache in der) ; Switzerland (French language in) ; French in Switzerland ; Other varieties of Italian ; Schweiz (it. Sprache in der) ; Switzerland (Italian language in) ; Italian in Switzerland ; Rhaeto-Romance
