You really think icelanders don’t have websites? Heck, Maltese is one of the official languages of EU so all the officiam EU pages are bound to be translated to that. Sámi languages have a official minority language status in nordic countries and they have tons their own websites.

Yes, because you’re privileged and happen to speak a common language. That’s doesn’t help those who don’t.

Then you just tell them your language anyway, but it’s more cumbersome to you.

But you are similarly revealing your language by going to said url.

Be requesting the specific language site you are giving them the information anyway.

You’d rather have your browser use the bandwidth to download all 500 language versions and 200 otherwise localized versions of the website and use some random language as default, maybe chinese or spanish for being the biggest languages.

If you have better ideas for financing firefox, go ahead :)