I noticed that there was an English page that was erroneously assigned as the English version of the home page.
So I went to this page, and clicked on Translate link bottom right.
I saw that this En page had 4 translations in other languages.
I removed those 4 translations from the list, thinking that this would just dissociate the En from the rest of the 4.
But in fact, this dissociate all 5 versions from each other.
Then I had to manually reassociate the 5 versions together, and it was hard cause I didn't remember the titles of all the versions. One of them was in Arabic and I don't read Arabic.
The Translation UI should convey information better in a way that one is not likely to do this mistake.