Stop your Mac keyboard language switching on its own

Why it happens

When more than one input source is installed, your Mac can swap between them. It may follow each document's last language, or you may hit the switch shortcut by accident while typing. With only one layout left, there's nothing to switch to.

How to fix it

1. Open System Settings and click Keyboard in the sidebar. Under Text Input, click Edit next to Input Sources.

   Keyboard›Text Input›Edit…

2. In the list on the left, click a layout you never type with and click the minus button below the list. Repeat until only the ones you need are left.

3. Click All Input Sources at the top of the list, then turn off Automatically switch to a document's input source.

   Keyboard›Text Input›Edit…›Automatically switch to a document's input source

4. Click Done and type a few lines in Notes. The language should now stay put.

Still not fixed?

1. If it changes when you press Caps Lock, select your other language in the same sheet and turn off Use the Caps Lock key to switch to and from ABC. The wording differs a little between languages.

   Keyboard›Text Input›Edit…›Use the Caps Lock key to switch to and from ABC

2. Control-Space swaps input sources, and it's easy to press by accident. To stop that, open Keyboard Shortcuts, click Input Sources and turn off Select the previous input source.

   Keyboard›Keyboard Shortcuts…›Input Sources›Select the previous input source

3. The Globe key can also switch language. In Keyboard settings, set Press 🌐 key to Do Nothing if you keep tapping it.

   Keyboard›Press 🌐 key to

4. If the language still changes with only one input source left and all these options off, contact Apple Support.