The Remote Server Administration Tools to Windows 10 only are avalaible in english currently. Furthermore, you can install this only if you have installed the Language Pack English (United States) previously.
If you are going to install the Language Pack English (United States) and you can’t install it in your computer, perhaps it’s the windows 10 compilation that you have.
Try to install this compilation. For this, download the correctly for your computer architecture.
Windows 10 x64 (Build 10240)
Windows 10 x86 (Build 10240)
Then press “Win+R”, introduce “lpksetup” without the quotation marks and press “Enter”.
Press in “Install display languages”.
Look for where you have the file “*.cab” that you have downloaded and install.
After installing the Language Pack, can install RSAT (Remote System Administration Tools)
After you install, you need to restart.
And then you’ll have available in the start menu.