I am using Windows 10 and right now I have English and Korean keyboards installed and two switch between the two I use the hotkey: Win + Space
The problem with this is that it switches to Hangul (Korean) language, but the keyboard still stays English. I then have to switch by pressing Right-Alt + Shift to get to proper Hangul keyboard OR use my mouse to click the Eng/Kor button.
Best Answer
Your question is not quite clear but what I understand is that you want to change the keyboard shortcut from Alt + Shift to Win + Space. I hope this link helps: https://support.office.com/en-au/article/Customize-keyboard-shortcuts-9a92343e-a781-4d5a-92f1-0f32e3ba5b4d