National Security Language Act

National Security Language Act - Amends the Higher Education Act of 1965 (HEA) to establish programs to encourage early foreign language instruction, including grants to: (1) partnerships of institutions of higher education (IHEs) and local educational agencies (LEAs) for activities relating to foreign language instruction at elementary or secondary schools, with priorities for high-need LEAs and less-commonly taught foreign languages; and (2) IHEs that develop innovative programs for the teaching of foreign languages, with priorities for combining foreign languages with science and technology and for less-commonly taught foreign languages.

Provides undergraduate student loan forgiveness of up to $10,000 for students who major in a critical foreign language and are employed as teachers of such language in elementary or secondary schools or as using such language regularly in a Federal agency.

Directs the Secretary of Education to: (1) establish a foreign language education marketing campaign to encourage students at secondary schools and IHEs to study foreign languages, particularly ones less commonly taught and critical to national security; and (2) conduct a study to identify foreign language heritage communities and recruit speakers of such critical languages.

Amends the David L. Boren National Security Education Act of 1991 to establish an International Flagship Language Initiative with grants to IHEs.