Foreign students studying in Indonesia are enhancing from year to year. As students who do not use their first language in communicating, both in learning and in social relationships, their ability to speak Indonesian requires to be tested. It is essential in order to ensure the continuity of the learning that will be passed. Consequently, the government owing to the Language Development and Cultivation Agency has established an Indonesian Language Proficiency Test (UKBI [Uji Kemahiran Berbahasa Indonesia]), which is a standardization test for proficiency in the language of Indonesian speakers, both native and foreign speakers. Despite being a tool to measure Indonesian language skills, UKBI also has the prospect to be utilized as a medium to encourage the diversity of Indonesian cultures. This effort is considered important to preserve and maintain the identity of the nation from the world's point of view, particularly against the speed of globalization. By observing various cultural elements in the three "reading texts" at UKBI by way of critical discourse analysis, it can be perceived that the three texts have the opportunity to defend the Indonesian language and culture. Furthermore, due to the test results of 30 foreign students in UKBI in Indonesia, foreign students' understanding and knowledge of the diversity of Indonesian languages and cultures were revealed.