Go to System Preferences: Users and Groups: Login Options.

Remove any unwanted languages from the list. Start by going to System Preferences: Keyboard: Input Sources, and make sure your preferred language is included in the list.Here is how to get your Mac to remember your preferred login keyboard layout: This setting won’t always persist and sometimes automatically changes to either the ABC Extended keyboard layout (default when no layout is set), or the wrong keyboard layout in a bilingual setup.

This can be a serious problem if you don’t realize what has happen, why your Mac won’t accept your password, and you don’t know what to do about it. You can change the keyboard layout from the input selector in the top left corner of the screen. However, if your password is dependent on a specific keyboard layout then you need to have the right keyboard layout set on the login screen. You may have this issue and not even realize it depending on what characters you use in your password. I’ve had problems with my Mac not remembering my keyboard layout in the start-up login window.

How to change mac language to english