The most reliable official source for offline installers is the Microsoft Volume Licensing Center . It provides ISO images containing the full set of language pack .cab files for specific Windows 10 versions.

For advanced users: You can slipstream language packs directly into a Windows 10 22H2 installation USB. This creates a single installer that asks "Which language do you want during setup?"

Browse to the location of your downloaded .cab file and follow the prompts to complete the installation. 3. Installation via Command Line (DISM)