The Languages of Berkeley: An Online Exhibition celebrates the magnificent diversity of languages that advance research, teaching, and learning at the University of California, Berkeley. It is the point of embarkation for an exciting sequential exhibit that built on one post per week, showcasing an array of digitized works in the original language chosen by those who work with these languages on a daily basis. Many of these early-published works are now in the public domain and are open to the world to read and share without restriction. Preparations for the online exhibition began in early 2018 with the final installment published online in October 2020. Using the Library’s instance of WordPress, the library exhibit comprises short essays of nearly all of the 59 modern and ancient languages that are currently taught across 14 departments on campus plus a dozen more languages that contributors wished to include. From September 2019 to August 2020, exhibit designer Aisha Hamilton and curator Claude Potts also installed a physical companion exhibition in Moffitt Library’s Free Speech Movement Café (FSM) centering on endangered languages which was cut short by the campus closure due to the COVID-19 Pandemic. Photos from that installation are archived in this catalog with the open book publishing platform Pressbooks, along with the complete entries from the online exhibition. Aside from core support from the Library and the Berkeley Language Center, this multi-year project would not have been possible without the contributions and hard work of more than 45 librarians, professors, lecturers, staff, and students.