Service encounters often become negotiations between the customer and the service provider. For speakers of multiple languages, the language used in a negotiation can be a critical factor in the success of that encounter. By investigating how U.S. bilinguals negotiate in either English or Spanish, this research examines the effect that the activation of the stereotype related to the minority language-speakers has on negotiation outcomes. The results of two experiments support the general notion that, among U.S. Hispanic bilinguals, the majority language (English) yields more favorable outcomes compared to the minority language (Spanish); a third study with a comparison group of bilinguals in Mexico, where no language-related stereotype exists, shows no effect of the negotiation language on the outcome. The paper discusses theoretical and practical implications of the findings and areas for future research.