According the Adult Education Department Directorate:
Certificates issued by the Adult Education Department only attest to an attendance of at least 70% of the course.
The certificate mentions the target level of the course but does not certify the level acquired by the learner to whom it is issued.
This is because the INL is the national authority for certification of the level of the Luxembourg language.
For more information, please consult the INL website:
http://www.inll.lu/certifications-nationales-et-internationales/certification-en-langue-luxembourgeoise
