Limited English proficiency
Limited English proficiency (LEP) is a term used in the United States that refers to a person who is not fluent in the English language, often because it is not their native language. Both LEP and English-language learner (ELL) are terms used by the Office for Civil Rights, a sub-agency of the U.S. Department of Education. According to data collected from the U.S. Census Bureau and Census Bureau American Community Survey (ACS) data, LEP individuals accounted for 9% of the U.S. population over the age of five. The definition of "limited English proficiency" varies between states and within state districts.