This is a simple table output of all country locale codes with quick search. You can find your country and locale here.
If the locale code is not mentioned here, you can create it for your case following the instructions.
How to construct your country locale code
Let’s see the Arabic (Egypt) – ar_EG locale code. First is the language code ar followed by the country code EG. Lets imagine that you are speaking greek and you are living in Cyprus your language code will be el and your country code will be CY and the full local code will looks like el_CY.