This is a non-exhaustive (growing) list of standardized tests that assess someone's language proficiency of a foreign/secondary language. Various types of such exams exist per many languages—some are organized at an international level even through national authoritarian organizations, while others simply for specific limited business or study orientation.

• Official ACTFL Oral Proficiency Interview (OPI)

• STAMP 4S English (Standards-Based Measurement of Proficiency-4 skills) 

• Berlitz Telelangue Language Audit

• Berlitz GTEC English Language Assessment

• Cambridge English Language Assessment

• Cambridge English: Advanced (CAE)

• Cambridge English: First (FCE)

• Cambridge English: Key (KET)

• Cambridge English: Preliminary (PET)

• Cambridge English: Proficiency (CPE)

• Cambridge English: Young Learners (YLE) tests

• CaMLA ECCE (The Examination for the Certificate of Competency in English)

• CaMLA ECPE (The Examination for the Certificate of Proficiency in English)

• CaMLA EPT (CaMLA English Placement Test)

• CaMLA ITASA (International Teaching Assistant Speaking Assessment)

• CaMLA MELAB (The Michigan English Language Assessment Battery)

• CaMLA MET (The Michigan English Test)

• Certificados en Lenguas Extranjeras (CLE). Certificate of proficiency in six foreign languages, English being one of them, issued by the Ministry of Education, City of Buenos Aires (Argentina). Tests the four skills. Targeted at primary and secondary-level students in the City of BA, for whom it is free of charge. See http://www.buenosaires.gob.ar/educacion/idiomas/certificados-en-lenguas-extranjeras

• (CAEL) The Canadian Academic English Language Assessment

• City & Guilds Entry Level 1 Certificate in ESOL International (reading, writing and listening) (Preliminary A1)

• City & Guilds Entry Level 1 Certificate in ESOL International (speaking) (Preliminary A1)

• City & Guilds Entry Level 2 Certificate in ESOL International (reading, writing and listening) (Access A2)

• City & Guilds Entry Level 2 Certificate in ESOL International (speaking) (Access A2)

• City & Guilds Entry Level 3 Certificate in ESOL International (reading, writing and listening) (Achiever B1)

• City & Guilds Entry Level 3 Certificate in ESOL International (speaking) (Achiever B1)

• City & Guilds Level 1 Certificate in ESOL International (reading, writing and listening) (Communicator B2)

• Duolingo Certificate in English - Online in the Duolingo Test Center

• ECL - European Consortium for the Certificate of Attainment in Modern Languages

• EF Standard English Test

• Former ELPT - English Language Proficiency Test

• GTEC - Global Test of English Communication

• G-TELP - General Tests of English Language Proficiency Test

• IELTS - International English Language Testing System

• IELCA - International English Language Competency Assessment (www.lrnglobal.org)

• iTEP - International Test of English Proficiency

• MHLE - Iran Ministry of Health Language Exam

• MSRT - Iran Ministry of Science, Research and Technology language exam (Also known as MCHE)

• MUET

• EXAMAGRAM - Free On-line English testing

• PAPORA - On-line Accreditation of A1/A2 English Proficency

• PTE Academic - On-line testing

• PTE General - A series of six exams from Pearson Language Assessments (formerly known as the London Tests of English)

• STEP EIKEN - Test in Practical English Proficiency (Japan)

• TEPS - Test of English Proficiency (South Korea)

• TELC - The European Language Certificates

• TIEC - Test of International English Competency

• TOEFL - Test of English as a Foreign Language

• TOEIC - Test of English for International Communication

• TOLIMO - The Test of Language by the Iranian Measurement Organization

• TrackTest English Proficiency Test - Online English Assessment Center using six CEFR levels.

• TSE - Test of Spoken English

• Trinity College London ESOL

• TWE - Test of Written English

• UBELT - University of Bath English Language Test