Sessions & Tracks : File and Session Management and Compatibility : Language Compatibility : Multilingual Application Support for Pro Tools Systems

Multilingual Application Support for Pro Tools Systems
(Localized OS on Mac Only)
Localized versions of Pro Tools (such as Pro Tools Korean, simplified Chinese, or Japanese) can be opened on a qualified Mac that supports English and the localized language versions of Mac. You can also select a different language in any localized version of Pro Tools (including English) in the Apple System Preferences.
To change to a different language version of Pro Tools:
1 Close Pro Tools if it is currently open.
2 Launch Apple System Preferences.
3 Click International (the “flag” icon).
4 Click the Language tab.
5 In the Languages column, drag the language you want to the top of the list.
6 Close the International window.
7 Do one of the following:
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If you are changing from a localized language to English, launch Pro Tools.
– or – 
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If you are changing from one localized language to another (or from English to a localized language), log out and log in from the Apple menu, then launch Pro Tools.
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If you want your computer to start with the previous language (after working on a different language version) follow the above steps and change the International preference back to the previous language.