Despite considerable studies in the field of second language acquisition (SLA), the precise cognitive processes occurring in an adult’s mind during second language (L2) learning remain elusive. This study investigates the intricate process of adult’s SLA, specifically focusing on Maltese. Grounded in chaos/complexity theory (C/CT), the research explores the non-linear, dynamic, and unpredictable nature of language learning, likening it to the emergence of order in seemingly chaotic systems. The study employs a qualitative approach, by employing various data collection methods such as structured tests, reflective journals, and interviews to track the learning progression of 35 adults learning Maltese over 15 months. The emphasis is on the acquisition of Maltese verbs and the emergence of non-linear learning curves, akin to the butterfly effect in C/CT. The findings underscore the chaotic yet harmonious nature of Maltese language learning, providing valuable insights for educators and learners alike.