Language is closely connected to personal, social, and cultural identity. The article Language and Academic Identity: Sociolinguistic Aspects of English as a Lingua Franca in the Scientific Community describes a research project that looks at the relationship between using English as a Lingua Franca (ELF) at universities and the image of the researcher in the scientific community. English has been widely recognised as the language of the international research community. Yet, while ELF has facilitated international co-operation and knowledge exchange, language choice has an effect on the researcher as an individual. Qualitative interviews with 40 lecturers and researchers at universities in Austria, Russia, Denmark, Ukraine, the Netherlands, Germany, Sweden, India, the UK, Slovenia, Mexico, France, Finland, and Saudi Arabia, conducted in May 2015, give an insight into the sociolinguistic aspects of using ELF. Areas addressed include contextual identity, social identity, and stylistic identity. In the context of existing research on language in international business, this project contributes new insights into using ELF in academia from a sociolinguistic point of view.