Anonymised data, study materials and full processing and analysis scripts are available from the Donders Repository at https://doi.org/10.34973/w0z9-p892. The project's preregistration is available under the Registrations tab. The paper is in press at Bilingualism, Language and Cognition [DOI tbd]. All figures by Nora Kennis, Xiaochen Y. Zheng, Angela de Bruin and Vitória Piai **Caption figure 1:** Experimental paradigm for the cued and voluntary tasks. Stimuli were counterbalanced between tasks. **Caption figure 2:** Mean naming latencies (per participant) as a function of task type and trial type. Each dot represents one participant. Black dots and lines represent overall mean per condition. **Caption figure 3:** Stimulus-locked ERPs and topographies for switch vs. repeat trials, based on a frontal cluster of eight electrodes (FC1, FCz, FC2, Fz, F3, F2, FC3 and F1) and a posterior cluster of eight electrodes (CP2, Pz, P3, CP1, P2, CPz, P1, CP3). Right panels represent the general switch effect while the left and middle panels show the switch effect in the cued and voluntary tasks respectively. The dashed lines mark the time window of interest (180 to 300 ms). Topographies show the difference between repeat and switch trials (computed as switch − repeat). **Caption figure 4:** Stimulus-locked ERPs showing the task effect and topographical map showing the location of the cluster associated with the significant effect. Left panel shows a representative frontal channel cluster of eight electrodes (FC1, FCz, FC2, Fz, F3, F2, FC3 and F1), middle panel shows a representative posterior cluster of eight electrodes (CP2, Pz, P3, CP1, P2, CPz, P1, CP3) for the task effect. Dashed lines indicate the time window of interest (180 to 300 ms). Right: topographical map showing the location of the observed effect after the Laplacian transform. **Caption figure 5:** Time-resolved power of the switch effect (power in switch trials – repeat trials, normalised by their average) and topographical maps of switch effects. Top: Left panel represents the switch effect in the cued task, right panel represents the effect in the voluntary task. These graphs show the average over the following channels: F3, F1, Fz, F2, F4, FC3, FC1, FCz, FC2, FC4, C3, C1, Cz, C2 and C4. The areas marked in black show the time and frequency window of interest for the statistical analysis (0-700 ms, 4-8 Hz). Bottom: topographical maps showing the switch effect in the theta band (4-8 Hz) between 200 and 600 ms after stimulus presentation.