Rosina Lozano is a historian of Latino history with a research and teaching focus on Mexican American history, the American West, migration and immigration, and comparative studies in race and ethnicity. Lozano's first book, An American Language: The History of Spanish in the United States (University of California Press, 2018), is a political history of the Spanish language in the United States from the incorporation of the Mexican cession in 1848 through World War II, with some discussion of the following decades and present-day concerns. The nation has always been multilingual, and Spanish-language rights, in particular, have remained an important political issue into the present. An American Language received the PROSE award in Language and Linguistics (2019) and the First Book Prize from the Immigration and Ethnic History Society. Lozano was featured on Al Punto with Jorge Ramos and has given numerous academic and public talks about her book. At Princeton, Lozano is associated with the Program in Latino Studies, the Program in American Studies (where she is a member of the Executive Committee), the Program in Latin American Studies, the Princeton-Mellon Urban Studies Program, and the PIIRS-sponsored Migration: People and Cultures Across Borders research group. Lozano served as a Service Focus faculty mentor in 2020-21.