The Defense Language Institute (DLI) is a United States Department of Defense educational institution located in Monterey, California. It specializes in teaching foreign languages to military personnel and government employees. The institute offers intensive language programs that focus on both spoken and written communication skills, preparing students for various assignments around the world. DLI provides instruction in over 30 languages, including Arabic, Mandarin Chinese, and Spanish. The courses are designed to be immersive and rigorous, often lasting several months. The goal is to enhance the language proficiency of students to support national security and diplomatic efforts.