Here click on Language to open the next panel. Click on it and select a language to add from the fly-out menu.On the right side, click on Language & region.In Windows 11, to Add or Install Languages, do the following: Add or Install Language on Windows 11/10 Windows 11 You can download and install additional languages for Windows 11/10 to view menus, dialog boxes, and other user-interface items in your preferred language using the Language Control Panel if Language Packs won’t install, then this post will show you how to install and uninstall languages in Windows 11/10 correctly.