Asia ; Sprachenzählung; Demography (linguistics) ; Language census ; 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) ; Speech intelligibility (language variation) ; Hochsprache; Schriftsprache; Acrolect; Standard language ; Other varieties of English