Valid in principle, but with regional nuances
A lease in English is legally valid in Belgium as a contract between private parties. However, in Flanders, language legislation may impose Dutch, and non-compliance can lead to nullity. In Brussels and Wallonia, French is the norm but English is not prohibited. Registration and court proceedings always use the regional language.
Belgium’s linguistic landscape adds complexity to the language of legal documents. While the Civil Code does not prescribe a specific language for private contracts, regional language laws may override this principle for certain types of documents.
For international tenants or landlords, understanding these rules is essential to avoid potential legal complications.
Risks and recommendations
| Region | English lease valid? | Risk | Recommendation |
|---|---|---|---|
| Flanders | Questionable | Nullity possible | Use Dutch (+ English translation) |
| Brussels | Yes | Low risk | Use French or Dutch (+ English translation) |
| Wallonia | Yes | Low risk | Use French (+ English translation) |
Key risks of an English-only lease:
- In Flanders, a party can request nullity of the lease on language grounds
- Registration offices may require a translation
- Court proceedings will be conducted in the regional language, requiring certified translation
- Certain legal terms may not translate precisely, leading to interpretation disputes
Even where an English lease is valid, all official proceedings (registration, court hearings, notifications to the tax authorities) must be conducted in the regional language. This means additional translation costs if the lease is in English.
Bilingual lease solution
The recommended approach for international tenants is a bilingual lease:
- Primary version in the official regional language (Dutch in Flanders, French or Dutch in Brussels, French in Wallonia)
- English translation annexed to the lease for practical understanding
- Priority clause stating that the official language version prevails in case of discrepancy
This approach satisfies the language requirements while ensuring the international tenant understands their obligations.
BailBelgique generates leases in French, Dutch and English, ensuring compliance with regional language requirements while providing multilingual access for international parties.
Regional specifics
Brussels-Capital Region
Brussels is bilingual (French/Dutch). An English lease is not expressly prohibited between private parties, but using French or Dutch is strongly recommended for registration and enforceability purposes.
Walloon Region
Wallonia requires French for official documents. An English lease between private parties is not prohibited but may face practical obstacles in registration and enforcement.
Flemish Region
Flanders has the strictest language requirements. The Taaldecreet of 19 July 1973 imposes Dutch for social and economic relations, which includes lease agreements. A lease in English may be declared null at the request of one of the parties.
Belgian Civil Code (freedom of contract) + Flemish Taaldecreet of 19 July 1973 + Regional language legislation — Language requirements depend on the property’s location.