Operating system and application settings
Although operating systems (OS) offer an out-of-the-box default configuration, users should be able to install other languages and define different aspects of language support.
Your product needs to identify and respect these language and region settings. The settings include the language of the users’ OS, their preferred language for installed apps, their country or region, and their preferred format for dates and times. Their browser might also have its own language settings, and browser-based applications should respect these settings.