This study addresses gaps in the existing literature on foreign language anxiety (FLA) by examining its impact on the oral proficiency of Chinese as a second language (CSL) learners. Unlike previous research, this investigation includes less commonly taught languages and considers the role of language contact as a mediating variable. Using structural equation modelling (SEM), we reveal that (1) CSL learning anxiety negatively affects CSL oral complexity and fluency in a direct way, but does not influence oral accuracy; (2) language contact affects CSL oral proficiency, with verbal contact having a particular impact on oral fluency; and (3) language contact does not mediate the relationship between CSL learning anxiety and oral proficiency. This study contributes to current theories of FLA in L2 acquisition by highlighting the roles of anxiety in different oral proficiency measurements even though the mediating effect of language contact does not exist.