Duolingo is a popular language-learning platform that offers courses in over 40 languages through its app and website. It is known for its user-friendly interface, gamified lessons, and accessibility. In addition to language learning, Duolingo also offers the Duolingo English Test (DET), an affordable and convenient English proficiency exam. The test is taken online from home, and it evaluates reading, writing, listening, and speaking skills. It is widely accepted by over 4,000 institutions globally, including top universities in the United States, United Kingdom, Canada, Australia, Ireland, and parts of Europe. Many foreign students choose the Duolingo English Test as an alternative to traditional exams like IELTS or TOEFL because it is faster, cheaper, and offers quick results within 48 hours.