The ILI, in 2012 having around 200 centers in 73 cities, offers language courses in Persian, English, French, German, Russian, Spanish, Chinese, and Arabic to around 175,000 learners.
After the Islamic Revolution, this society affiliated with the Institute for the Intellectual Development of Children and Young Adults and, therefore, expanded its services.
The international examination of Spanish (DELE) is simultaneously administered in 86 countries by Servantes Institute every year.
The exam is administered in three levels (Básico, Intermedio, Superiory) in Iran by the embassy of Spain.
Considering the growing political, cultural, and business relations between Iran and the Spanish-speaking countries, the ILI has established the Spanish language department using methods and textbooks approved by Instituto Cervantes in Madrid.