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During oral interaction, bilingual speakers can maintain the language that they intend to use or switch to a second one if required by the situation. These actions are made possible with the support of a control mechanism, which enables the selection of a target language while inhibiting the non-target language. Behavioral research over the past fifteen years has yielded significant evidence that this mechanism is not language-specific but operated by executive control. Functional imaging is a valuable research method for facilitating understanding of this issue. In this review, we discuss the main studies that collected ERPs and fMRI data during a bilingual switch task. The results obtained by these two techniques are compared in order to better understand the nature of the language control (with respect to inhibition). Results show many similarities with studies using switch paradigms in non-linguistic tasks, especially in terms of the modulations observed with regard to the N200 component, combined with the role of the anterior cingulate cortex and dorsolateral prefrontal cortex. These results corroborate the hypothesis that the executive system plays a major part in bilingual control.