Periphery (linguistic geography) ; Core/periphery (linguistic geography) ; Three circles model (of world Englishes) ; Center/periphery (linguistic geography) ; Vowel change ; Periods (historical linguistics) ; History of language (sociolinguistics) ; Transfer (languages in contact) ; Adstratum language; Adstratsprache; Interference ; Pluricentric language ; Linguamotorik; Lingual articulation; Advanced tongue root; ATR (phonem. feat.) ; Vokalhöhe; Vowel height; Tongue position ; Phonische Interferenz; Languages in contact (phon.) ; Sprachkontakt (phon.) ; Interference (phon.) ; English (British) ; Grossbritannien (engl. Sprache in) ; Great Britain (English language in) ; Englisch in Grossbritannien; English in Great Britain; British English ; Südafrika (engl. Sprache in) ; South Africa (English language in) ; English in South Africa ; Kaaps-Hollands; Kaaps-Nederlands; Kapholländisch; Kapniederländisch; Cape Dutch