Techniques (in research) ; Research techniques ; Emic/etic (method.) ; Emisch/etisch (method.) ; Feldforschung; Field work; Field linguistics ; Phonology (sociolinguistics) ; Sociophonology ; Areallinguistik; Geolinguistik; Geolinguistics; Linguistic geography ; Dialektgrenze; Dialect boundary; Linguistic frontier ; Regional language ; Diphthongization ; Monophthongization ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English
