According to a study, undergraduate enrollments in foreign-language courses at American colleges and universities rose 6.6 percent between 2006 and 2009. Graduate level foreign-language enrollments, however, declined 6.7 percent for the same period. Spanish, French, German, and American Sign Language (ASL) are the four most popular languages. Arabic has risen two positions in the ranking since 2006 to eighth most popular.
Furman, N., Goldberg, D., & Lusin, N. (2010). Enrollments in languages other than English in United States institutions of higher education, fall 2009. United States: The Modern Language Association of America. www.mla.org/pdf/2009_enrollment_survey.pdf