Mac mini OS X Yosemite 10.10.5 iTunes help comes up in Arabic.

Hello TWids57,

Thanks for using Apple Support Communities.

If iTunes is appearing in another language, then your system language setting has been changed. To change it back to the language you prefer please follow the steps below.

Changing your language setting in iTunes

Mac OS X

1. From the Apple () menu, choose System Preferences.
2. Choose View > Language & Text (Mac OS X v10.5 or later) or View > International (Mac OS X v10.4.9 or earlier).
3. Drag your language of choice to the top of the list.
4. Quit System Preferences.
5. Quit and reopen iTunes.

iTunes: Changing the display language - Apple Support

Have a good one.

Hello TWids57,

Given that you've already made sure that English is your preferred language in the Language and Text System Preferences, and that this is only occurring in the iTunes Help, then I recommend getting in contact with our AppleCare phone support by using the link below.

Apple - Support - Product Selection

Take care.