Supporting students in the development of early learning literacy is a challenge for teachers. From a multimodal perspective, educational technologies constitute an interesting alternative to traditional approaches. In order to assist teachers in their practices, a research and development (R&D) program was initiated by a team of researchers. The web-based literacy program, ABRACADABRA, was adapted from the English original version. In order to reflect the French linguistic characteristics, a derivational morphology activity was added to the program. This article presents the design process of this activity, especially the criteria which guided the selection of items. This discussion will inform the teaching as well as the scientific communities on the significance of linguistic characteristics when creating morphological activities. Furthermore, it will highlight the strengths and weaknesses of such control in the development of an activity involving educational technologies.