The advent of advanced artificial intelligence (AI) technology, represented by ChatGPT, has ushered in new possibilities in the realm of language learning and teaching. This pre-application pedagogic position study delves into the potential benefits and associated challenges of employing ChatGPT as a potent pedagogical instrument for the acquisition of legal vocabulary. The proposed pedagogy is based on the authors’ primary experiences with the use of ChatGPT for their personal and pedagogical purposes and an unsystematic application of the pedagogy in EAP classes for undergraduate students at a law school of a university in Bangladesh. Our pre-application proposed innovative ChatGPT-mediated approach to vocabulary instruction is theoretically grounded in constructivism in language teaching and (web) technology in constructivist language pedagogy. The proposed pedagogy utilizes online newspapers with legal terminology, creating an interactive learning environment that encourages active participation and covers pronunciation, meaning, and spelling. It leverages primary language word definitions, refines pronunciation, fosters bilingual comprehension, and enhances spelling proficiency, offering a comprehensive learning experience. However, the study also predicts that the implementation of ChatGPT-based language instruction may involve challenges related to educator proficiency, student participation, resource limitations, and technology requirements. This study not only underscores the value of ChatGPT in language education but also paves the way for future research and innovation in the field.