Title: How to Download the Official Windows 10 Multi-Language ISO (No Third-Party Tools)
Microsoft does not provide a single "click here" button. However, you can obtain the legitimate Multilanguage ISO using two legal methods.
Official sources for Windows 10 ISO files
Tips and Tricks for Using a Multi-Language ISO File
Customize Settings: Uncheck "Use the recommended options for this PC". This allows you to manually select: Language: Choose your primary language.
: Select a mobile device (like an iPad) and refresh the page. This trick forces the site to offer direct ISO links. Select Edition : Under "Select edition", choose Windows 10 (multi-edition ISO) and click Confirm. Choose Language
The Download Windows 10 Tool is the official utility for creating installation media.
How to Create a Bootable USB Drive from a Multi-Language ISO File