ACTFL Proficiency Assessments are developed in accordance with the published ACTFL Proficiency Guidelines, a national metric for measuring language competence based on the U.S. governments Interagency Language Roundtable (ILR) language descriptors, and adapted for applicability in an academic setting. ACTFL assessments are designed to elicit the level specific global functions and language tasks specified in the Guidelines. ACTFL is the Specialized Professional Association representing the foreign language specialty area of the National Council on the Accreditation of Teacher Education (NCATE). The ACTFL Oral Proficiency Interview has been favorably reviewed by the American Council on Education (ACE).

Every year, ACTFL and LTI successfully administer tens of thousands of tests, both in the U.S. and internationally, in over 56 languages and for a broad range of academic needs including entrance, placement and graduation requirements; program evaluation; hiring and promotion decisions; credentialing of teachers and language professionals; and other situations where language proficiency needs to be demonstrated. All assessments are rated by language professionals that have passed the rigorous ACTFL Tester Certification Process, one of the most selective and respected language proficiency tester trainings in the world.