Question about Microsoft Office Home & Student 2021

Can this Office be switched to German? It should actually work after German has been downloaded from https://support.microsoft.com/de-de/office/language-accessory-pack-f%C3%BCr-office-82ee1236-0f9a-45ee-9c72-05b026ee809f. Because this product is 20.- cheaper than https://www.digitec.ch/de/s1/product/microsoft-office-home-student-2021-unbegrenzt-1-x-windows-mac-os-deutsch-office-software-16447465.