Mother tongue (teaching of) ; Mundartgrammatik; Dialect grammar ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; Language situation ; History of language ; Sprachenwahl; Language choice; Diglossia ; Language variation/Dialectology ; Mundartforschung; Dialectology ; Creole continuum; Dialect continuum; Dialektkontinuum; Kontinuum (Soziolinguistik) ; Continuum (sociolinguistics) ; Soziolektales Kontinuum; Continuum (dialectology) ; Pluricentric language ; Language planning; Purification of language; Sprachpurismus; Sprachverfall; Language decay; Language cultivation ; Hochsprache; Schriftsprache; Acrolect; Standard language ; Idiotikon; Mundartwörterbuch; Dialect dictionary ; German ; English ; Holländisch; Dutch ; Kajkavisch; Kajkavian; Mittelsüdslawisch; Serbo-Croatian