The Central Eurasian Studies Summer Institute (CESSI) is an eight-week summer intensive language program for undergraduate and graduate students, researchers, and professionals.

Course offerings each summer are dependent on student interest and enrollment. Typical course offerings include Kazakh, Tajik, Uyghur, and Uzbek. Languages are generally offered at the beginning and intermediate level, although advanced level courses may be offered with sufficient student interest. Additional languages, such as Kyrgyz or Azerbaijani, may also be offered with sufficient interest.

CESSI is one of the Wisconsin Intensive Summer Language Institutes (WISLI).