It's possible to easily change the language of your invoice to meet the needs of your customers.
First, create your invoice as usual in Debitoor.
Click on the arrow in the 'Options' section below the invoice lines and click the drop down menu next to 'Language' to select the desired language.
Remember that there are many things you need to keep in mind when you issue your invoices in another language. Does your tax office accept invoices in Italian? You can find more information here (in German).