English as a second language; ESL; TESOL ; Dialekt (im Unterricht) ; Dialect (in class) ; Language variation (language teaching) ; Periphery (linguistic geography) ; Core/periphery (linguistic geography) ; Three circles model (of world Englishes) ; Center/periphery (linguistic geography) ; English as international medium ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Sprachliche Unsicherheit; Linguistic insecurity ; Pluricentric language ; Hochsprache; Schriftsprache; Acrolect; Standard language ; Other varieties of English ; Singapur (engl. Sprache in) ; Singapore (English language in) ; Singlish; English in Singapore
