Normally, if you add a new language to Windows 10, it will tell whether a Language Pack is available, and if so, it will give you an option to install it.
If you don't see this option, you can install the Language Pack manually.
First of all you need to obtain a language .cab file for correct Windows 10 version. If you have an MSDN subscription, you can download full Microsoft Language Pack ISO image directly from there. If you don't have MSDN, you can find this file online after a bit of searching. If you need English (United States) language pack for Windows 10 RTM 64bit (for example to install RSAT), you can download it from here.
Once you have the right .cab file, process is pretty simple:
- Start > Run type lpksetup and press Enter
- Follow a simple wizard, select your language .cab file, and restart the PC when prompted
August 2015
Windows 10 Pro 64bit
when i try to install the english us language pack on my xiaomi book 15 it says this language can't be install in this computer. Can I know the reason?
win10 build 19041.388 language zh-CN