What about We are no men but women?
It was marked as wrong.
We are no men but women. - "(My) nejsme žádní muži, ale ženy."
"We are not men, we are women" seems fine to me as well...
"We are not men, we are women" means "(My) nejsme muži, (my) jsme ženy.
"We aren't men but women" is marked as a typo, but it is correct
You probably had some real typo there. Contractions are accepted automatically.
Strange. It wasn't one of those questions that requires a typed answer. I selected the words in boxes, including [are][n't]. I should have taken a screenshot.
That explains it, "We are n't men but women." is detected as a typo. That is a Duolingo issue which we cannot influence in any way. You can ask for details in the Troubleshooting forum or make a bug report.
Thanks, posted in Troubleshooting (https://forum.duolingo.com/comment/36788633)