Since anaconda-26.17-1, the user creation spoke shows an orange-bar warning if the password you set contains any non-ASCII characters. The English warning text reads: "The password you have provided contains non-ASCII characters. You may not be able to switch between keyboard layouts to login. Press Done to continue." however, you can't actually press Done to continue. No matter how many times you click Done, the screen won't let you out unless you change the password not to contain any non-ASCII characters.
Assigning to mkolman, since "Improved password quality checking" and "Use a sane unified password checking policy" were his changes.
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle. Changing version to '26'.
https://github.com/rhinstaller/anaconda/pull/1103 fixes this, in my testing.
Note this is intentionally filed against F26: I think we should fix this for F26, not just Rawhide.
anaconda-26.21.10-1.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-3aec86381a
anaconda-26.21.10-1.fc26, anaconda-user-help-26.1-5.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-3aec86381a
anaconda-26.21.10-1.fc26, anaconda-user-help-26.1-5.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.