Because there is a huge difference between those two:
https://en.wikipedia.org/wiki/Canada
https://fr.wikipedia.org/wiki/Canada https://en.wikipedia.org/wiki/Canada
https://fr.wikipedia.org/wiki/CanadaThe browser could even show specialized UI such as "FR" as a clickable dropdown menu to allow users to switch languages. Chrome already does this for searching a single website through the address bar (type domain.com TAB)
Basically these changes are not thought for you. You are not representative of the average Web user.
These aren't decisions for a useragent to make, and there aren't enough browsers out there that people have a reasonable choice.
Bastardising the url isn't a solution to anything, it's a step towards something that Google, not users, want (in making AMP "trivial").
Wikipedia FR > Canada
I look at that angle bracket with the white space, and I get chills. And I'm not even drawing attention to that oh-so-glaring omission of the /wiki/ context. Truly horrifying.Repeat. This is not sarcasm.
Dark roads ahead, friends.