This study investigated the influence of language - first language (L1) versus second language (L2) -- on the experience and the expression of the emotion of guilt. Fifty-two Greek - Spanish bilinguals read two moral scenarios that induced guilt in their L2 (Spanish) and rated the intensity with which they felt a series of emotions (moral scenario task). Then they were asked to recall and write about a real-life event that made them feel guilty in their L2 (autobiographical memory task). A month later they performed the same tasks in their L1. Content analysis and emotional vocabulary analysis were conducted to examine cross-linguistic differences in the expression of guilt. Overall, these bilinguals experienced higher levels of guilt and regret when they read the moral scenarios in their L1 Greek. They also used a greater number of emotion words in their autobiographical memories in L1. However, they appeared to be more willing to talk about sensitive topics (e.g. infidelity, homosexuality, and death) in their L2. These findings have implications for both psychotherapy and L2 instruction.