ISO 639 codes

ISO 639 codes are standardized short identifiers for languages used internationally, typically consisting of two or three letters. They enable consistent communication about languages across software, libraries, and organizations worldwide. For example, "EN" stands for English, while "ES" is Spanish. These codes help ensure clarity when identifying languages in various contexts, such as websites, translation services, and language research. By providing a common system, ISO 639 simplifies handling and sharing language-related information globally.