This article focuses on the method of interlinguistic comparisons in the third language acquisition from the subjective perspective of language teachers. On the basis of interviews with teachers, who teach English as a second foreign language after German in the French-speaking part of Switzerland, we analyse their experience with this method, their estimation of its effects on learning, as well as potential obstacles that may prevent teachers from making interlinguistic comparisons in the EFL-classroom. In contrast to what has been claimed in (scientific) publications on the topic, we could observe that it does not (only) depend on attitudes if teachers use multilingual pedagogical approaches, but also on their individual linguistic resources.