WordPress Locale Code
This is a complete list of WordPress Language Locales. A locale is a set of parameters that defines the user’s language, region, and any special variant preferences that the user wants to see in their user interface. Usually, a locale identifier consists of at least a language code and a country/region code.
For example, to translate into Chinese(China), your language file will be zh_CN.po and zh_CN.mo
Please Note: – You can search by using CRTL/CMD + F to find a specific language.