In the vast literature on language attrition, studies on the role of extralinguistic factors in language retention, particularly concerning foreign language (FL) skills acquired in formal instructional contexts, are scarce. We address this issue by focusing on the impact of the frequency of FL use, both extramural and in the classroom, and…

In L1 attrition research, it's recognized that a previously acquired language can transform under the influence of a newly acquired one. However, the precise L1-L2 relationship is intricate and warrants further study. Some research suggest that L2 mastery might reduce L1 proficiency, while others show that both languages can be maintained. Age of…