BCP 47 (Best Current Practice)

BCP 47 is a formal set of rules for creating standardized language and region codes used on the internet and in software. These codes help identify languages, dialects, and regional variations, ensuring consistent and accurate communication across different systems and platforms. For example, it specifies codes like "en" for English or "fr-CA" for Canadian French. By following BCP 47, developers and organizations can reliably specify and handle multiple languages, improving user experience and interoperability globally.