The Rodriguez-Fornells, Rotte, Heinze, Nösselt and Münte (2002) paper published in Nature, “Brain potential and functional MRI evidence for how to handle two languages with one brain”, is discussed by two of its authors, both neuroscientists, and by two language scientists. First, a short summary of the paper is given. This is followed by a critical commentary offered by the language scientists. The neuroscientists respond, and a final comment is offered by the language scientists. The four authors conclude that a two-way collaboration between neurosciences and language sciences should be encouraged in order to make headway in our understanding of language processing and representation in bilinguals.