Design of Multilingual Augmented Reality Application for Rupiah Paper Currency Recognition

Augmented Reality is a technology that integrates the virtual world into the real world in real-time, offering significant benefits in entertainment, architecture, and education. This research presents the development of Rupiah AR, a mobile-based application that introduces Indonesian Rupiah banknotes using Augmented Reality. The application includes multilingual support to accommodate diverse users, both local and international, and provides additional features such as historical information about the figures on the banknotes, currency conversion to dollars, and culinary and tourism recommendations. The development process follows the User-Centered Design method through four main stages: understanding the context of use via user interviews, specifying user requirements using an activity diagram, designing solutions with wireframes and prototypes, and evaluating requirements through Black Box Testing and SUS. Evaluation results show that all features pass Black Box Testing successfully, while the SUS score of $\mathbf{7 2. 7 5}$ places the application in the “Good” category, indicating positive user acceptance.