Institut za strane jezike

What Institut za strane jezike does

Institut za strane jezike is a Belgrade-based foreign language education institution founded in 1952, listed on the Belgrade Stock Exchange (BELEX:INSJ) and operating with 51–100 employees. The Institute delivers classical (in-person) and online language courses across eight languages — English, German, French, Russian, Spanish, Italian, Serbian as a foreign language, and Serbian for foreigners — to four primary segments: adult learners, children and youth, corporate clients, and foreigners learning Serbian. It also serves as an authorized TOEFL iBT test site, a licensed telc examination center, and a Gold Partner of the Addvantage program, providing internationally recognized certification channels in Serbia.

The Institute monetizes through six revenue streams: recurring course fees (in-person and online), exam proctoring and preparation (TOEFL iBT, telc), proprietary publishing (ESSE and NSSN dictionaries, ESSE Junior, STEP BY STEP, BOOKMARK textbooks), translation services, educational tourism (summer programs at the University of Hertfordshire in the UK and Skouras Camp in Halkidiki, Greece, plus Erasmus+), and customized corporate language training with year-round enrollment. Distribution is omnichannel: multiple enrollment locations across Belgrade for in-person classes, online remote delivery, corporate on-site training, and international summer programs. Marketing relies primarily on the institutional website (inst.isj.rs), word-of-mouth referrals (e.g., parent testimonials), and earned media, with no disclosed paid advertising.

The underlying technology platform is minimal — the Institute is a services business with no proprietary technology stack disclosed. Its competitive position rests on 70+ years of operating history, in-house published learning materials, exclusive exam-proctoring licenses, and a diversified multi-segment course portfolio. Pricing is not publicly disclosed; prospective students apply via inquiry form, with a family discount available for households enrolling two or more children. The Institute's strategic posture is defensive stabilization of a mature, domestic education business with incremental international summer-program expansion rather than aggressive scaling.

Name

Institut za strane jezike

Legal name

Institut za strane jezike

Website

https://isj.rs

Company type

Private

Founded year

1953

Operating status

Operating

Headcount range

51–100 employees

Short description

Institut za strane jezike is a Belgrade-based, publicly listed language school founded in 1952 that delivers in-person and online courses in 8 languages to adults, children, corporate clients, and foreigners in Serbia, with licensed telc and TOEFL iBT exam centers, proprietary publications, and international summer programs.

Ownership category

akta.pro rank

Product category

Language Education Services

NAICS

Language Schools (611630), Exam Preparation and Tutoring (611691), Educational Support Services (611710)

SIC

Services-Educational Services (8200)

akta.pro industry

PRIMARYEDAMAFAA

General Language Schools & Institutes

Education/Supplemental & Enrichment Programs (Arts, STEM, Language)/Language Learning & Conversation Programs

SECONDARYEDAMAFAF

Exam Preparation for Language Proficiency (TOEFL/IELTS/DELE/HSK/JLPT, etc.)

Education/Supplemental & Enrichment Programs (Arts, STEM, Language)/Language Learning & Conversation Programs

SECONDARYEDAIAEAA

General Language Schools (Multi-Language)

Education/International Education & Study Abroad/Overseas Language Schools & Immersion Programs

Keywords

• Foreign language courses
• Language school services
• Corporate language training
• Exam preparation testing
• Educational tourism programs

Headquarters

HQ city

Belgrade

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure, Others

Revenue model

1. Language Courses for Adults and Children: Recurring course fee revenue from classical (in-person) and online language courses across eight languages (English, German, French, Russian, Spanish, Italian, Serbian for foreigners). Enrollment opens seasonally.
2. International Exam Proctoring and Preparation: Revenue from authorized TOEFL iBT test administration and telc exam preparation and proctoring services. The institute is a licensed test center.
3. Publishing and Dictionaries: Sale of proprietary language learning publications including the ESSE English-Serbian dictionary, NSSN German-Serbian dictionary, ESSE Junior, STEP BY STEP, and BOOKMARK textbooks.
4. Translation Services: Professional translation services offered as part of the Institute's Center for Research and Development.
5. Educational Tourism: Revenue from organized language travel programs including summer English school at University of Hertfordshire (UK), summer language camp in Greece (Skouras Camp, Halkidiki), and Erasmus+ programs.
6. Corporate Language Training: Customized language courses for businesses and institutions, with ongoing enrollment for corporate clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels3 records

Core offering

Institut za strane jezike is a Belgrade-based foreign language school that delivers classical in-person and online language courses across eight languages (English, German, French, Russian, Spanish, Italian, Serbian as a foreign language, and Serbian for foreigners) to adults, children, and youth. Beyond language instruction, it operates as an authorized TOEFL iBT test site and licensed telc examination center, runs corporate language training, organizes educational tourism programs (summer English school at the University of Hertfordshire, summer camp in Halkidiki, Greece, and Erasmus+ exchanges), and publishes proprietary dictionaries and textbooks.

Product overview

Institut za strane jezike is a language learning institution offering a comprehensive portfolio of language courses and educational services. The core offering consists of classical and online language courses in six languages (English, German, French, Russian, Spanish, and Italian) for adults, children, and youth. Specialized programs include Serbian language courses for foreigners, corporate training for businesses, and summer programs (Summer English School, Greece language camp, Erasmus+). The institute serves as an authorized TOEFL iBT testing center and licensed telc exam preparation center. Additionally, the institution publishes educational materials including the ESSE English-Serbian dictionary, NSSN German-Serbian dictionary, ESSE Junior dictionary, and textbooks (STEP BY STEP, BOOKMARK). The Addvantage Gold Partner status enables preparation for internationally recognized diplomas.

Differentiator

Problem solved

Functional benefit

Products and services

• English Language Course (Classical) Classical in-person English language course for adults, children, and youth covering multiple proficiency levels, delivered at enrollment locations across Belgrade.
• Online English Language Course Live-online English language course covering multiple proficiency levels, accessible remotely to learners regardless of location.
• German Language Course (Classical) Classical in-person German language course, including preparation for the internationally recognized telc German language examination.
• Online German Language Course Live-online German language course covering multiple proficiency levels, including telc exam preparation, delivered remotely.
• French Language Course (Classical) Classical in-person French language course covering multiple proficiency levels at Belgrade enrollment locations.
• Online French Language Course Live-online French language course covering multiple proficiency levels, accessible remotely.
• Russian Language Course (Classical) Classical in-person Russian language course covering multiple proficiency levels at Belgrade enrollment locations.
• Online Russian Language Course Live-online Russian language course covering multiple proficiency levels, accessible remotely.
• Spanish Language Course (Classical) Classical in-person Spanish language course covering multiple proficiency levels at Belgrade enrollment locations.
• Online Spanish Language Course Live-online Spanish language course covering multiple proficiency levels, accessible remotely.
• Italian Language Course (Classical) Classical in-person Italian language course covering multiple proficiency levels at Belgrade enrollment locations.
• Online Italian Language Course Live-online Italian language course covering multiple proficiency levels, accessible remotely.
• Serbian Language for Foreigners Specialized Serbian language courses designed for foreign nationals learning Serbian as a second language, addressing integration and language-barrier needs.
• Corporate Language Training for Companies and Institutions Customized language training programs for corporate clients and institutions, with year-round enrollment, delivered on-site at client premises or at designated locations.
• Children and Youth Language Courses Language instruction courses specifically designed for children and young people, including kindergarten and preschool programs, with age-appropriate curriculum and teaching methods; family discount applies when two or more children from the same family enroll.
• TOEFL iBT Authorized Testing Center Authorized administration of official TOEFL iBT English proficiency examinations at the institute's Belgrade test site for candidates requiring internationally recognized English certification.
• telc Licensed Exam Preparation and Administration Center Licensed center for preparation and administration of the prestigious telc international German language examination, including exam preparation courses and official administration.
• Addvantage Gold Partner Diploma Preparation Preparation programs for internationally recognized diplomas delivered under the Addvantage program, with the institute holding Gold Partner status as a premier preparation center in Belgrade.
• Summer English School 2026 (University of Hertfordshire, UK) Intensive summer English language program held at the University of Hertfordshire (UK) from July 12–26, 2026, combining language instruction with cultural and educational tourism activities.
• Summer Language Camp in Greece (Skouras Camp, Halkidiki) Summer language camp held at Skouras Camp in Halkidiki, Greece from June 21–30, 2026, combining language learning with cultural exchange in a summer camp setting.
• Erasmus+ Program Participation European Union educational exchange and mobility program combining language education with international adventure opportunities for enrolled students.
• ESSE English-Serbian Dictionary Contemporary English and Serbian language dictionary with CD-ROM suitable for beginners and advanced learners, published by the institute as part of its in-house publishing operations.
• NSSN German-Serbian Dictionary Contemporary German and Serbian language dictionary with CD-ROM suitable for beginners and advanced learners, published by the institute as part of its in-house publishing operations.
• ESSE Junior English Dictionary English dictionary designed for children aged 10–16 and those beginning to learn English as beginners, published by the institute as part of its in-house publishing operations.
• STEP BY STEP Textbook Language learning textbook designed for true beginners, authored by Jelena Kovačević and published by the institute as part of its in-house publishing operations.
• BOOKMARK Textbook Language learning textbook designed for course participants at Beginner Level 2 (A2), authored by Lidija Babović and published by the institute as part of its in-house publishing operations.

Quantifiable outcome

• Family discount for households with two or more enrolled children

Named customers5 records

Segments5 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core and minor.

• telc (The European Language Certificates)coreStrategic or Co-development Partner · 7 June 2017The Institute is a licensed telc examination center, authorized to prepare and administer telc language certification exams in Serbia. This partnership provides access to internationally recognized European language qualifications, particularly for German language learners, and establishes the Institute as an official testing venue.
• Addvantage ProgramcoreGTM or Marketing Partner · 17 February 2017The Institute holds Gold Partner status within the Addvantage program — a recognition that positions it as a premier preparation center for internationally recognized language diplomas in Belgrade. The Addvantage program provides the Institute with access to standardized international curriculum frameworks and certification pathways, enhancing the institute's credibility and market positioning.
• ETS (Educational Testing Service) — TOEFL iBT ProgramcoreStrategic or Co-development PartnerThe Institute is an authorized TOEFL iBT test site, enabling it to administer the globally recognized TOEFL English proficiency examination. This partnership positions the Institute as a key venue for international English language certification in Serbia.
• University of HertfordshireminorStrategic or Co-development PartnerThe Institute collaborates with the University of Hertfordshire (UK) to offer a Summer School of English language program. The 2026 program is scheduled for July 12–26, 2026, at the university campus in the UK. This partnership enables educational tourism and provides students with an immersive English language experience in an academic setting.
• Skouras Camp, Halkidiki (Greece)minorStrategic or Co-development PartnerThe Institute partners with Skouras Camp in Halkidiki, Greece, to offer a Summer Language Camp. The 2026 program runs from June 21–30, 2026. This partnership supports the Institute's educational tourism offerings, combining language learning with cultural exchange in a summer camp setting.
• Erasmus+ ProgrammeminorStrategic or Co-development PartnerThe Institute participates in the Erasmus+ program, combining education with adventure. This European Union educational mobility program enables the Institute to offer international exchange and educational travel opportunities to its students, expanding its reach beyond Serbia.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• British Council Serbia: Global English-teaching institution offering English courses and IELTS/TOEFL preparation in Belgrade. Direct overlap with ISJ's English courses and TOEFL iBT test center, serving similar adult and youth learners.
• Alliance Française de Belgrade: French cultural institute offering French language courses and cultural programming in Belgrade. Directly competes with ISJ's French language offering in the same city and customer segment.
• Goethe-Institut Serbien: The German cultural institute operates German language courses and telc exam preparation in Belgrade, directly competing with ISJ's German language offering and licensed telc test center. Most direct competitor for the German exam-prep line.
• International House Belgrade: Network of language schools offering English and other languages with Cambridge/RSA exam preparation. Direct overlap with ISJ on exam-prep positioning and adult learner courses.
• Instituto Cervantes Belgrade: Spanish cultural institute offering Spanish language courses and DELE exam preparation. Direct competitor for ISJ's Spanish course line in the Belgrade market.

Broad incumbents

• Berlitz Corporation: Global language-training provider with in-person and online courses across many languages plus corporate training. Comparable multi-language, multi-format model to ISJ, though broader geographic scale and more enterprise focus.
• Wall Street English: Global English-language school franchise with blended online + in-person methodology. Comparable adult-learner targeting and corporate-training capability to ISJ.
• EF Education First: Global language education company with in-person schools, online courses, and educational travel programs. Comparable to ISJ's combination of language courses and educational tourism (Hertfordshire/Skouras partnerships).

Regional players

• InSerbia Language School: Serbian-as-foreign-language provider offering courses to foreigners, comparable to ISJ's specialized 'Srpski jezik za strance' product. Smaller and more niche, focused on the same foreign-learner segment.
• Filološki centar (Faculty of Philology language programs): Belgrade university-affiliated language program offering foreign-language courses for adults. Comparable Serbian-market adult language education offering to ISJ, but academic rather than commercial positioning.

Market position

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/kucaodreci
• LinkedInlinkedin.com/company/institut-za-strane-jezike-the-institute-for-foreign-languages

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Institut za strane jezike