Harmony, an innovative software designed for psychologists and social scientists, provides sophisticated natural language processing and generative AI models that simplify and expediate the questionnaire harmonisation process. For instance, CES-D vs EDDS comparison, which previously would have occupied the researchers with manual and time-consuming methods, can now be carried out efficiently and expediently. The CES-D (Center for Epidemiological Studies-Depression) and EDDS (Eating Disorder Diagnostic Scale) are both systematic tools employed widely in psychology research. Using Harmony, researchers can easily juxtapose the individual items of CES-D and EDDS in different languages. Harmony’s AI algorithms can efficiently calculate a comparison percentage between each item, thus encouraging researchers to delve deeper in examining consistencies or discrepancies across findings from both these questionnaires. The CES-D vs EDDS comparison also stands crucial for longitudinal analysis across diverse studies. Utilizing Harmony enables psychologists to aggregate findings from diverse studies and empower them with new insights. With the facilitated CES-D vs EDDS examination, they can potentially discern whether results remain consistent across studies or fluctuate based on evolving social conditions. Thus, Harmony, with its advanced data analysis and harmonisation capabilities, incentivizes more robust and extensive research in psychological studies.