I'm currently on Windows while my MacBook gets repaired. I used Microsoft Keyboard Layout Creator to tweak Arabic (101) so that layout matched the layout of Arabic letters on my Macbook.
I installed the keyboard, Arabic (101) - Custom, as per the instructions here, but I'm now stuck. When I try and add the keyboard under Preferred Languages in Settings, I can choose one of several Arabic language by country, and when I click on options, I have the ability to 'Add a keyboard', which is where my custom keyboard turns up. If I choose to add Arabic (101) - Custom as a keyboard, and then switch to Arabic, the keyboard is still layed out as per the original Arabic (101). If I remove the original and add my Custom keyboard, the whole language disappears from my Preferred Languages.
Can someone help with what I'm doing wrong?