Cognitive abilities between monolingual and bilingual individuals may differ on various cognitive tasks involving memory, executive functions and language. As the literature is divided on this topic, it is increasingly important to validate new cognitive screening tools among linguistically diverse groups to account for possible monolingual or bilingual advantages. Otherwise, assessments could be subject to misinterpretation, leading to inaccurate diagnoses. The English version of the Dépistage Cognitif de Québec (DCQ, www.dcqtest.org) recently developed at the Clinique Interdisciplinaire de Mémoire de Québec (CIME), is one of these new cognitive tools designed specifically for better recognition of atypical dementia. The current study aimed to compare healthy older monolingual and bilingual anglophones on this new test to assess any possible differences that could lie between groups on the total DCQ scores and each of the five DCQ indexes: Memory, Visuospatial, Executive, Language and Behavioural. The results showed a statistically significant advantage for the bilingual participants on the Language Index, which contributed to the significant bilingual advantage on the DCQ total scores. Even though these results were no longer significant after a Bonferroni correction, and even if no significant differences between groups were found on any of the other indexes, this study highlights the importance of identifying and characterizing linguistic diversity before using new screening tools in clinical settings. Potential cognitive advantages in bilingual participants, even in healthy older adults, should be considered when interpreting test data and explicitly discussed in neuropsychological reports. Similar studies with patient groups and with other types of cognitive screening tools should be conducted, especially to further examine the differences between groups on language-related tasks.