The quest for understanding and mapping human mental health often necessitates the comparison of multiple research instruments, like the Center for Epidemiological Studies-Depression (CES-D) and the Mood Disorders Questionnaire (MDQ). One commonly perceived challenge in mental health research is the task of harmonisation between these questionnaires, which traditionally, can be a subjective and time-consuming process. This is where Harmony comes into the picture. A state-of-the-art software developed for psychologists and social scientists, Harmony offers a streamlined approach to harmonising questionnaire items, allowing for a comprehensive and user-friendly analysis. By using Harmony, psychologists can readily compare CES-D vs MDQ, digging deep into each item, and uncovering new insights into the world of mental health and depression. Harmony does more than just harmonisation; it uses large language models to provide in-depth comparisons between different instruments. When comparing CES-D vs MDQ, Harmony evaluates every aspect of each item and provides a detailed match percentage. This feature could be invaluable for researchers, enabling them to understand and interpret the complex interconnections and subtle nuances between different mental health indicators in these instruments. Additionally, Harmony also offers potential for comparisons in multi-language settings, thereby increasing the scope and scale of research studies. In conclusion, when it comes to CES-D vs MDQ, Harmony significantly simplifies and standardizes the harmonisation process, making it a must-have tool for psychologists and researchers alike. With the capacity to compare and analyze multiple questionnaire items across different languages, Harmony brings unprecedented convenience, precision, and comprehensiveness to mental health research. By choosing Harmony, researchers can spend less time on the tedious process of harmonisation and more time on what they do best – unraveling the complexities of the human mind.