The MAC OSX system language can be changed such as alerts, menus, dialogs, keyboard input etc! If you are learning another language or if you have a foreign friend who wants to use your MAC machine, the language can be changed very easily!
Follow these steps to proceed:
Click on the Apple logo
Click on “System Preferences”
Open “International” in System Preferences
Drag the chosen language to the top of your actual language
Close by clicking on the red button
Now restart your machine for changes to take effect!