Language tagging is the process of assigning a specific language code to a piece of text or content. This helps identify the language used, making it easier for software and applications to process, translate, or display the content appropriately. Language tags are often based on standards like ISO 639, which provides a set of codes for different languages. In digital communication, language tagging is crucial for improving user experience. For example, websites can use language tags to serve content in a user's preferred language, while search engines can better index and retrieve information. This ensures that users receive relevant content in their chosen language.