No, Duolingo has a typo.
I'd like Duo to have a canned report for these types of things. I'm trying to think of a good alternative suggestion to, "I don't have a typo, you have a typo."
I've noticed that Duo seems to have more of these mistakes in the web than on the app. It seems like Duo has a separate database for acceptable answers on the web than on the app.
That would explain the comments in the forum such as, "x is now accepted", with a reply "not for me."
Also the web doesn't have a free form response like there is on the app. To report an error like this one, you have to select 'something else went wrong.'
entendre is the right answer, not "ententre."