Location of Language and Locale files

I'm using OpenSUSE 13.2 with GNOME 3.14 Deskopn Environment.

My interface language is en_US while my locale is ar_SY. My locale contain some wrong data about months names (May and June) and I want to repaire that manually.

Where to find the locale files in order to change the values?

Not the locale but the data with in the locale, for instance :

In Syria, May is أيار but it's written as نواران in the locale ar_SY and I want to fix that.