This project aims to investigate the consistency of neuroimaging findings in bi or multilingual subjects. While multiple theories exist in attempt to explain brain changes associated with learning multiple languages (e.g. Grundy et al., 2017; Green & Abutalebi, 2013), there is still a lack of understanding the consistency of the effect on the brain across studies. We presented results on two independent meta-analyses at the Society for Neuroscience meeting in 2019: 1. Gray matter volume differences between bilingual and monolingual subjects from voxel-based morphometry (VBM) studies. 2. Functional (fMRI) differences between bilingual and monolingual adults on non-verbal task switching protocols. The poster presented at the SfN 2019 meeting is found in the poster component of this project. You can find supplemental material for the preprint of the gray matter meta-analysis in the Foci Files and GingerALE output components. This is also the supplemental material for the final published version of this work in *Frontiers in Human Neuroscience* (https://doi.org/10.3389/fnhum.2020.00146) Prisma Flow Diagram for the VBM meta-analysis is included in the files here as well. You can also find foci files and GingerALE ouptut for the fMRI meta-analysis on task-switching studies for early and late bilinguals in this project. This work is being presented at the 2022 SfN meeting in San Diego with a pre-print soon to be available.