This study investigated how the integration of app creation into second language education has changed the landscape of Indonesian teaching and learning at a university in Taiwan. Drawing primarily on the TPACK model and a combination of frameworks from trans-disciplinarity, heutagogy, and cognitive load, we analyzed the quantitative and qualitative data collected from a digital humanities course to explore to what extent teaching students to use App Inventor 2 to document their own learning in Indonesian could enhance L2 learning. Our findings showed the participating instructors and teaching assistants all required very high level of interdisciplinary trainings to achieve real trans-disciplinarity. The participating students who demonstrated good Indonesian language proficiency seemed to welcome the additional opportunity of making their own apps, especially if the software had been compatible with their iPhones. However, for the students who were still struggling with L2 learning, the extra burden of creating apps was deemed overwhelming and distractive. However, if the assignments had been better integrated with the vocabulary and the contents of the textbook, the students would have appreciated it more. As students are getting increasingly sophisticated in digital technology, we need to be prepared to provide a better L2 teaching package with content knowledge, pedagogy, and technology fully integrated in a tightly knit trans-disciplinary model to better serve our future students.