The process of matching item similarities between psychological questionnaires has traditionally been a time-consuming and subjective process. However, with the advent of technology, this process, also known as harmonisation, has become significantly easier and more accurate. Using software like Harmony allows psychologists to compare different measures with ease and precision. Specifically, when comparing measures such as General Health Questionnaire (GHQ 12) vs Children’s Hopefulness Scale (CHS), Harmony’s AI and natural language processing capabilities offer vast benefits. By using Harmony, a GHQ 12 vs CHS comparison can be completed quickly and accurately. Harmony allows users to select instruments from its database or even upload their own materials for analysis. With a few clicks, the software can compare each item within the GHQ 12 and CHS, providing a percentage match for each pair. This allows for a more fine-tuned and objective analysis of the questionnaires, peeling away the layers of subjectivity that often make this process cumbersome and inconsistent. Moreover, Harmony goes beyond simple comparisons, offering multi-language support making GHQ 12 vs CHS comparison across global studies feasible. This feature greatly enhances the research scope, allowing for more comprehensive longitudinal analysis and better cross-population comparisons. As researchers continue to test the results of both GHQ 12 and CHS across various studies, Harmony provides a powerful, streamlined, and multilingual tool that revolutionizes the process of psychological questionnaire harmonisation.