Sources ; Mundartgrammatik; Dialect grammar ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Sprachliche Unsicherheit; Linguistic insecurity ; Language situation ; Dialektmischung; Dialect mixing; Dialect formation; Dialect leveling; Dialect loss ; Sprachbewahrung; Ethnolinguistic vitality; Vitality, ethnolinguistic; Sprachwechsel; Language shift; Heritage language; Language maintenance ; Sprachentod; Extinct language; Language endangerment; Bedrohte Sprache; Linguicide; Linguizid; Language death ; USA (dt. Sprache in den) ; USA (German language in the) ; German in the USA