Read the two quotations by two researchers, commenting on some lexico-grammatical features of English as a lingua franca: “Seidlhofer (2004) points out that they appear to be generally unproblematic and do not cause an obstacle to communicative success in ELF.” (paragraph 2) “Jenkins argues that such features occur regularly in ELF interactions and do not cause intelligibility problems.” (paragraph 3) From the two statements it is possible to understand that, in the teaching of English as a língua franca, a central issue concerning learners’ production of the English language is