You live in French-speaking Belgium, in Wallonia or Brussels, and you're putting together your application for Belgian citizenship. You're wondering what level of French you need to prove, which test to sit, and how all of that fits together with the other requirements (residence, integration, economic participation). Official information is scattered across the Tribunal de première instance (Court of First Instance), the Federal Public Service Justice, the Office des étrangers (Immigration Office) and the Royal Decree of 14 January 2013, so working out what actually applies to you takes some digging.
This guide pulls together the language requirements that apply in 2026, the accepted tests, the exemptions, and a realistic plan to reach the required level without wasting time.
To become Belgian through a nationality declaration (article 12bis), you must prove knowledge of one of the three national languages (French, Dutch or German) at A2 minimum on the Common European Framework of Reference for Languages (CEFR). For French, the standard test is the DELF A2. Other certificates are accepted: a TCF score corresponding to A2, certificates from the Enseignement de Promotion Sociale (EPS), attestations from the Centres Régionaux d'Intégration (CRI) in Wallonia or the Bapa in Brussels, or a Belgian diploma issued in the language concerned. Proof of social integration and proof of economic participation (468 days of salaried work or self-employed equivalent over the last 5 years) are the other two key conditions, on top of 5 years of uninterrupted legal residence. The application is filed with the civil registrar of your municipality, then the Procureur du Roi issues an opinion within 4 months. The total cost includes a 150 EUR (about 162 USD) federal tax stamp plus a registration duty (around 1,030 EUR / 1,115 USD in 2025, indexed each year).
1. The routes to Belgian citizenship
Two main routes lead to Belgian nationality:
Nationality declaration - article 12bis (the standard route)
This is the ordinary procedure and applies to the vast majority of foreigners living in Belgium. Main conditions:
- Be at least 18 years old
- Have 5 years of legal, uninterrupted residence in Belgium with a valid residence permit
- Prove knowledge of a national language (French, Dutch or German) at A2
- Prove social integration (integration courses, Belgian diploma, or 5 years of legal work)
- Prove economic participation: 468 days of salaried work or self-employed equivalent over the last 5 years
Naturalization (exceptional cases)
A much rarer procedure granted on an exceptional basis by the Chamber of Representatives to people who have rendered notable services to Belgium (top athletes, recognized artists, and so on). We won't dwell on it here.
2. The A2 level - what you need to be able to do
A2 on the CEFR scale corresponds to elementary use of the language. Concretely, in both speaking and writing, you should be able to:
- Understand simple sentences on familiar topics (daily life, work, school, family)
- Communicate in everyday situations: shopping, booking appointments, asking for directions
- Describe in simple terms your background, your circle, your job
- Write short, simple messages (an email, a note, a postcard)
- Read brief texts on concrete topics
It's a level that's well within reach for someone who has lived in French-speaking Belgium for several years. If you work, shop and chat with your neighbors in French on a daily basis, you're probably already at this level or very close to it.
3. Accepted tests and certificates
DELF A2 - the default choice
The Diplôme d'Études en Langue Française at A2 is the most widely recognized test. It's an official, lifelong diploma issued by France Éducation international (under the French Ministry of National Education) and accepted everywhere in French-speaking Belgium.
- Format: 4 sections (listening, reading, speaking, writing)
- Duration: about 1 hour 45 minutes total
- Price: 90 to 130 EUR (~100-145 USD) depending on the center
- Validity: for life
- Sessions: roughly 4 per year in most centers
- Centers in Belgium: Alliances françaises in Brussels, Liège, Charleroi, Namur, Mons, plus several approved institutions
TCF - the faster alternative
The Test de Connaissance du Français covers every CEFR level (A1 to C2) in a single sitting. If your score corresponds to A2, it's valid for Belgian citizenship.
- Price: 90 to 120 EUR (~100-135 USD)
- Validity: 2 years
- Upside: fast, multiple-choice format, results within 4 weeks
Certificates from approved schools
Several institutions and associations in French-speaking Belgium offer adult French courses leading to a recognized certificate. These certificates are accepted for the nationality declaration as long as they confirm A2 level.
- EPS - Enseignement de Promotion Sociale (Wallonia and Brussels): adult courses leading to a recognized level certificate
- CRI - Centres Régionaux d'Intégration in Wallonia (CRIPEL in Liège, CIMB in Mons-Borinage, CeRAIC, and others)
- Bapa - Bureau d'Accueil pour Primo-Arrivants (Brussels, formerly BAPA BXL and Via)
- French courses in Brussels run by certain municipalities or accredited associations
Belgian diploma in French
If you hold a Belgian diploma in French (CESS, the Belgian secondary school diploma; bachelor's degree; master's), you're exempt from the test. The diploma itself is your proof of language knowledge.
4. The other conditions to meet in parallel
5 years of uninterrupted legal residence
You must have lived in Belgium legally and uninterruptedly for 5 years on a valid residence permit. Time spent in Belgium on a precarious permit (student, asylum seeker awaiting a decision) doesn't always count, so check your specific situation.
Social integration
You must prove your social integration. Several ways to do it:
- Complete an integration program in your region (Wallonia: CRI; Brussels: Bapa)
- Hold a diploma recognized in Belgium
- Have worked legally for 5 years in Belgium
- Complete a vocational training program of at least 400 hours
Economic participation - 468 days
You must show evidence of legal employment in Belgium. According to the Royal Decree of 14 January 2013, the exact threshold is 468 days of salaried work (or equivalent self-employment with full social security contributions) over the 5 years preceding the declaration. This means declared, uninterrupted work with contributions, not occasional undeclared jobs. The requirement can be waived in certain cases (long-term illness, stay-at-home parent, medical exemption), so it's worth checking with a lawyer specializing in immigration law.
5. The procedure - step by step
- Gather your file: language certificate (DELF A2 or equivalent), proof of social integration, employment records (Dimona register, payslips, ONSS attestations), residence permit, criminal record extract, birth certificate.
- File the declaration with the civil registrar of your municipality (who then forwards it to the Tribunal de première instance, the Procureur du Roi and the Office des étrangers).
- Pay the fees: federal tax stamp of 150 EUR (162 USD) plus a registration duty of around 1,030 EUR (1,115 USD) in 2025 (indexed each year). Depending on your procedure and municipality, additional costs may apply (translations, certified copies, legalizations).
- The Procureur du Roi has 4 months to issue an opinion. He can extend the deadline by 1 additional month if he requests supplementary documents. If no opinion is issued in that time, it's deemed favorable.
- Registration in the nationality registers and issuance of your nationality certificate.
- Updating your ID documents (Belgian ID card, passport).
Total timeline: 4 to 8 months for a clean file.
6. How to reach A2 efficiently
If you're not yet at solid A2 level, here's a realistic plan to get there in 3 to 6 months:
- 30 to 45 minutes a day of regular practice (better than 3 hours on the weekend).
- Plenty of listening: Belgian radio stations (RTBF), podcasts in slow French (RFI Savoirs).
- Real speaking practice: a tandem with a French-speaking Belgian, a language café, or a structured immersive method.
- A method built for understanding natural spoken French: 360 French Immersion from HelloFrench offers 60 authentic native-to-native dialogues with word-by-word karaoke. Ideal for moving from textbook French to the French actually spoken in French-speaking Belgium.
- For the test: pick up a DELF A2 prep book (the « Réussir le DELF » series, for example) with audio and answer keys.
Discover 360 French Immersion →
Official sources
- justice.belgium.be - Federal Public Service Justice, « Devenir belge » section (article 12bis declaration procedure)
- Belgian Nationality Code of 28 June 1984, amended by the law of 4 December 2012
- Royal Decree of 14 January 2013 implementing the law of 4 December 2012 (468 days of work, integration evidence, A2 level)
- agii.be and vreemdelingenrecht.be - practical procedural summaries and legal fact sheets
- alliance-francaise.be - official DELF centers in Belgium
NB: This article reflects the procedure that applies in Q1 2026. The registration duty is indexed each year (1,030 EUR on 29 July 2025, the latest official update available). Belgian nationality requirements evolve regularly, so always check the latest version on the official sites and with your municipality's population service before filing your application.
