According to Belgian language laws, the billing documents of specific Regions are created in the official language(s) of those Regions. This means that:
Please read the section “3.2 Language of billing documents” of our Billing guides for more details ("Billing Guide – If I pay the toll post-paid with a fuel card, via a Business Partner or by direct debit" OR "Billing Guide – If I pay the toll prepaid, or post-paid with a credit card").