A more thorough explanation:

The Foreign Service Institute (FSI) is a department within the U.S. Department of State that is responsible for training officers and employees of the Foreign Service, as well as personnel in other agencies. The FSI provides language training, cultural education, and professional development courses to prepare individuals for work in foreign countries.

John is a new Foreign Service Officer who will be working in Brazil. Before he begins his assignment, he attends a six-month training program at the Foreign Service Institute to learn Portuguese, study Brazilian culture, and receive guidance on how to conduct himself in a professional manner while working abroad.

The FSI also provides training to employees of other government agencies who will be working overseas, such as the Department of Defense or the Peace Corps. For example, a Peace Corps volunteer who will be teaching English in Thailand may attend language and cultural training at the FSI before departing for their assignment.

These examples illustrate how the Foreign Service Institute provides essential training to individuals who will be working in foreign countries. By providing language and cultural education, the FSI helps prepare individuals to effectively communicate and navigate cultural differences while representing the United States abroad.