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English as a foreign language is no longer the sole object of specialized language classes, but increasingly a medium of university‐level instruction in a range of content areas. This leads to a complex interaction between new academic content and the means of expressing this expertise through appropriate disciplinary language uses. Conceptually, this study focuses on oral disciplinary–reasoning episodes, in which knowledge structures are explicitly developed. These episodes exemplify diverse ways whereby disciplinary meaning making is co‐constructed in English‐medium instruction (EMI), with one specific type being language‐related episodes which clarify specific items of terminology. Drawing on INTE‐R‐LICA, an international and interdisciplinary project, the database under investigation covers 671 minutes (67,605 words) of classroom discourse from a Spanish business administration degree programme. Findings suggest a structural diversity within these episodes, which are jointly constructed, and involve a rich variety of discursive strategies to effectuate meaning making. Our results indicate that an understanding of the crucial role of language in this disciplinary meaning‐making process is essential for the TESOLprofession to remain relevant in the current English language teaching educational landscape. In addition to providing expert input into the potential of a language‐sensitive EMIpedagogy, TESOLteacher education will need to foster both language and content teachers’ awareness of the disciplinary nature of classroom discourse and its role in developing subject expertise among their students.

While disagreements are often considered dispreferred choices and potentially face-threatening acts due to their oppositional nature, this perception does not adequately reflect the importance of disagreeing for many types of interaction, such as problem-solving and decision-making. Developing ability in performing this speech act therefore becomes relevant for learners of an L2 in order to show achievements in such general language learning targets as expressing and defending opinions and arguments, as well as negotiating consensual decisions. This paper presents a sequential analysis of disagreements in assessed interactions of advanced German-speaking learners of English, observed in three different exam formats, i.e. teacher-led interview, role play with teacher and paired student interaction. Overall, 33 disagreement episodes were identified in 18 oral exams. Findings show that the choice of examination format constrains range and type of disagreement trajectory enacted by the learners, highlighting the influence of minor contextual differences. Moreover, analyses of these exams suggest that linguistic alignment can and does co-exist with oppositional talk, supporting the notion that the purpose of achieving a successful joint performance of L2 interaction carries weight even when there is disagreement on a content level.