Berlitz Language and Business Training sarl has received authorisation from Luxembourg's Ministry of National Education, Children and Youth that their Luxembourgish language classes will from now on be certified for those applying for Luxembourgish nationality (this applies to people who have been living in Luxembourg more than 20 years).

The following classes will be certified:

- Luxembourgish Level 1 (A1): 30 hours individual / 45 hours group

- Luxembourgish Level 2 (A2.1): 30 hours individual / 45 hours group

- Luxembourgish Level 3 (A2.2): 30 hours individual / 45 hours group

- Luxembourgish Level 4 (A2.3): 30 hours individual / 45 hours group

- Luxembourgish Level 5 (B1.1): 30 hours individual / 45 hours group

- Luxembourgish Level 6 (B1.2): 30 hours individual / 45 hours group

- Luxembourgish Level 7 (B1.3): 30 hours individual / 45 hours group

- Luxembourgish Level 8 (B2.1): 30 hours individual / 45 hours group

- Luxembourgish Level 9 (B1.2): 30 hours individual / 45 hours group

- Luxembourgish Level 10 (C1/2): 30 hours individual / 45 hours group

The authorisation is for a period of 5 years from 17 October 2017.

Up until now, only the Institut National des Langues (INL) has bee certified for Luxembourgish language classes for those applying for Luxembourgish nationality.