This paper explores the ethical challenges and possibilities of conducting responsible and transformative translanguaging pedagogy in adult education for second language learners with limited previous experience of schooling. We identify and explore ethical dilemmas in teachers' interaction and multilingual teaching practices. The data was produced in a linguistic ethnography and action research project. It consists of classroom observations and interviews with teachers who teach in the programme Swedish for Immigrants (SFI). The teachers express and embody ambivalence in relation to the students' use of their whole linguistic repertoires and the students are not always treated as competent to make informed decisions about their own use of linguistic repertoires. This touches on issues of citizenship and democracy and here the framework ethics of care offers context-specific ways of understanding and responding to the ethical challenges of multilingual teaching.