Windows protects the base language (originally installed with OS) from removal. Removing others safely requires dism /Remove-Package with the exact package name. Simply changing UI language back to English the other language pack – it stays on disk, taking space.
Windows 10 language packs allow you to change the language used for the Windows interface—including menus, dialog boxes, and help topics—across your entire system. These packs often include additional "Features on Demand" such as , handwriting recognition , and basic typing (spell checking and dictionaries) . How to Install a Language Pack windows 10 language packs
Once installed, you can switch the entire Windows interface to that language: settings, select your new language from the Windows display language dropdown menu. Sign out and sign back in Windows 10 language packs allow you to change