Where the exam fits in naturalisation
Passing the Sproochentest is one condition for naturalisation, not the whole of it. guichet.lu lists naturalisation as open to adults who have legally resided in Luxembourg for at least five years — the final year uninterrupted — who show knowledge of Luxembourgish through a language test pass certificate, and who have taken the Vivre ensemble au Grand-Duché de Luxembourg course or passed its test.
Last verified against official sources on 18 August 2026. Exam fees, dates and regulations change — always confirm on inll.lu before you register.
What are the conditions for naturalisation?
These are legal conditions, so they are given here as guichet.lu states them, and the page itself is linked below. Do not treat this summary as the authority.
- Age
- Naturalisation is open to adults.
- Residence
- At least five years of legal residence in Luxembourg. The final year immediately preceding the application must have been uninterrupted.
- Language
- Knowledge of Luxembourgish, evidenced by a Luxembourgish language test pass certificate — the Sproochentest.
- Vivre ensemble
- Having taken the "Vivre ensemble au Grand-Duché de Luxembourg" course, or passed the test covering the subjects it teaches.
Where does the Sproochentest fit?
It produces one of the documents the application needs. The language condition is met by the pass certificate, which is why the exam sits early in most people’s timeline: the certificate has to exist before the application that relies on it.
It is also the condition most within your control. Residence accrues on its own, and the Vivre ensemble requirement is a course or a test on published subjects. The language test is the one that rewards preparation.
How is a naturalisation application made?
guichet.lu states that the application is submitted in person to the commune of residence, where the civil registrar sends the file to the Ministry of Justice. The Minister of Justice then grants or rejects naturalisation by ministerial order, within a period of eight months from submission.
Your commune is therefore the right first stop for anything specific to your own file — not this site, and not a forum.
What is the "Vivre ensemble" course?
The second condition people underestimate. It is a 24-hour course in three modules: the fundamental rights of citizens (6 hours), the state and communal institutions of the Grand Duchy (12 hours), and the history of Luxembourg and European integration (6 hours). You either take the course or pass a test covering the same subjects.
- Registration for the course, and for the test, is free.
- Registration is done online, and guichet.lu states it is definitive and cannot be modified — so check your details before submitting.
- There is a medical exemption, applied for from the Minister of Justice, where your physical or mental state does not allow you to acquire the knowledge taught.
- The history module can be waived automatically if you hold certain prior certificates from a welcome and integration contract or citizenship pact modules.
It is worth planning around it rather than discovering it late: it is 24 hours of your time, it is separate from the language test, and both have to be done before the application.
Is naturalisation the same as acquiring nationality by option?
No, and the difference matters because advice about one circulates as if it applied to the other. Option is a separate procedure with its own cases and its own conditions.
Can the language requirement be waived?
guichet.lu describes an exemption where a person’s physical or mental state does not allow them to learn Luxembourgish: they may apply to the Minister of Justice, supported by a medical certificate from a specialist doctor.
Whether any particular situation qualifies is a decision for the Ministry on the evidence, not something a website can tell you in advance.
Where these facts come from
Every factual claim on this page is traceable to an official source. Where something is not published, this page says so instead of guessing.
- Acquiring Luxembourgish nationality by naturalisationguichet.lu — the Luxembourg government’s citizen portal
- Prerequisites for voluntary acquisition of nationalityguichet.lu — the Luxembourg government’s citizen portal
- Acquiring Luxembourgish nationality by optionguichet.lu — the Luxembourg government’s citizen portal
- Introduction to the SproochentestInstitut National des Langues — the body that runs the exam