When I'm on the first page, English is shown in the languages section like this foo.com/en

But when I am in another language like French foo.com/fr or Chinese foo.com/cn the English language is shown as foo.com and when I click on it, It does not redirect to the main page! And the same page is shown again, for example foo.com/fr

In other languages, I want to change the English link in the languages drop down menu to foo.com/en, because it is like foo.com

How and from which path should I do this?