Definition: Locale.php refers to a PHP file that serves as a locale translator, often used for translation into various languages. It allows developers to adapt their websites or applications across different locales. The document defines terms like "language code" which represents a country's official language, and "locale" is a term in programming to define the system of numbers used to represent the state codes of countries. For example, if you have an application in three languages (English, Spanish, French) using PHP 8 or newer, it would be helpful to know how these languages are represented on a global scale. The locale.php file could then contain information such as: - Language code for each language - A list of available locales - An array of keys and values corresponding to the state codes used by those locales Understanding this can make it easier to build applications that can work across different locales, even if some translations might be in different languages.