BackgroundThe COVID‐19 pandemic created a unique learning experience, characterised by school closures and a shift to online learning. Research suggests that online learning during the pandemic negatively impacted the reading development of elementary school children. However, little is known about the challenges of learning a second language (L2) remotely. Therefore, this study investigates the impact of online learning during the pandemic on language and reading development among French immersion (FI) students who learn French as an L2.MethodsA total of 137 Grade 1 and Grade 2 students from two cohorts were included in the study. The in‐person cohort consisted of 72 students who attended school in person and were tested in person before the pandemic. The online cohort consisted of 65 students who received virtual instruction during the pandemic and were tested online. Measures of vocabulary, word reading accuracy and fluency, and phonological awareness were administered in English and French to both cohorts. Analyses of covariance (ANCOVAs) were carried out to assess the effects of cohort and grade on the measures, with guardian education as a covariate.ResultsStudents in the in‐person cohort performed significantly better on French vocabulary and English word reading accuracy than students online. The cohort effect was not significant for other French and English measures. Grade 2 students significantly outperformed Grade 1 students in both English and French vocabulary and word reading.ConclusionsThe current results suggest that online learning may have had a moderately negative effect on French vocabulary but no impact on French phonological awareness or word reading. FI students' English skills were also largely unaffected. Therefore, FI students made progress on their language and literacy skills through online learning during the pandemic. The findings point to the importance of enhancing L2 vocabulary input during online learning.