Language offers a vast amount of information about an individual's social and personality processes. Prior studies have found links between personality traits, attitudes, and language use. To further extend prior work on links between personality traits, attitudes, and language use, this study examined the link between career goal affordance beliefs and language usage using the goal congruency perspective. Using data from 944 engineering undergraduates (69.70% male) in an engineering course-track, we investigated whether students' agentic and prosocial goal affordance beliefs towards engineering relate to their interpersonal and achievement-related language use in their writing about their career plan. Regression analyses revealed that prosocial goal affordance beliefs were positively associated with social words and affiliation words, and negatively with family words. Agentic goal affordance beliefs were positively associated with money words and not associated with achievement or reward words. The goal congruency perspective was supported as prosocial goal affordance beliefs related to the use of words oriented toward others, whereas agentic goal affordance beliefs related to the use of words oriented toward the self.