Huh? How is a localization being tied to a browser bundle vs OS remotely the same as a website offering the ability to view content in different languages? I c

Huh? How is a localization being tied to a browser bundle vs OS remotely the same as a website offering the ability to view content in different languages? I can change my OS locale settings just by opening up a panel. Firefox wants me to install a new official locale or a new browser bundle to do the same. Btw, content language is not a locale preference, it's contextual. Browsers could have a standard dropdown in their UI to change that header on the fly, sure, but that wouldn't make language selection unnecessary. Take something like Wikipedia, the contents are widely different across languages, and switching is common for multilingual readers.