In Belgium, the language used in official documents is regulated by law.

There is no free choice of language when drawing up employee documents.
The area in which the company's head office is located is decisive in determining the applicable language regulations.

In order to determine the applicable language regulations, the area in which the company's head office is located is decisive.   

Note! Documents that are not drawn up in the correct language may be declared invalid.
You can request a duplicate payslip in the other national language via your employer.