With the rise of positive psychology (PP) and its emphasis on the affordances of positive emotions to second/foreign language teaching and learning, numerous studies have been conducted on different PP constructs all over the world. Nonetheless, the status of researching this school of psychology in L2 education is still imprecise. To fill this gap, the present state-of-the-art paper intends to flesh out the conceptualizations, premises, versatilities, emerging theories and methods, and research trends in PP and second language acquisition (SLA). Moreover, it elaborates on the seven PP factors, including optimism, immediacy, connectedness, commitment, academic buoyancy, immunity, and mindfulness. Such sample variables have also been supported by scientific evidence from different contexts. Additionally, some potential implications are drawn for stakeholders to enlighten the process and quality of L2 education. Finally, the study suggests some avenues for future studies to expand the scope of PP and SLA research and practice.
