It was brought up on Simple Talk that Simple English isn’t shown under any of the geographically sorted languages. (See: https://simple.wikipedia.org/wiki/Wikipedia:Simple_talk#Getting_to_simple_articles_from_English)
To test this, I went to [[Ronald Reagan]] on the English Wikipedia and tried to find a link to the Simple English Wikipedia, where it is a Very Good Article. I checked each geographically sorted section of the Languages popup, as well as searching for Simple, and was unable to find it.