Bilingualism is hard to define, measure, and study. Sparked by the so-called replication crisis in the social sciences, a recent discussion on the advantages of open science is gaining momentum. Here we join this debate to argue that bilingualism research would greatly benefit from embracing open science. We do so in a unique way, by presenting six fictional stories that illustrate how open science practices — sharing preprints, materials, code, and data; pre-registering studies; and joining large-scale collaborations — can strengthen bilingualism research and further improve its quality.