This paper deals with the training of undergraduate engineering students and is interdisciplinary in nature. It brings together three distinct aspects of scientific dissemination: the content of an engineering degree; the oral transmission of this content following the effective TED talks model; and the use English as a medium of scientific transmission. The paper highlights the need for trainee Spanish engineers to be able to communicate their work to the public through oral presentations that are brief and entertaining, yet scientifically rigorous. The core of the study consists of an analysis of a particular TED talk that is relevant for a variety of engineering degrees. We conclude that while it is necessary for Spanish engineers to receive specific training at a professional level in oral communication skills, there is a close relationship between the mode of transmission and the subject specific content to be transmitted that needs to be considered carefully. Developing a mastery of English is important, but essential communication skills are the most crucial aspect, regardless of the language of communication.