cannot login when someone got similar login but with polish special chars

[nook86]

hello

i see issue that.. i have user
with login Mały

and user with login maly

both got nicename maly

cannot login to Mały
after i changed in database login to szudarski started working properly

also cannot then use login with email with additional plugin.

greetings
Pawel

[desrosj]

Hi @nook86,

Welcome to Trac! First of, my apologies that this took so long to receive a response.

I'm not sure if you're still experiencing this issue, but I've done some testing on the version indicated in the initial report (4.3) and the most recent version of WordPress (currently 6.6) and neither version allows a the ł character to be submitted in the username or e-mail field. I tried both the admin facing users.php screen and the register option for wp-login.php when a site has open registration.

Looking at the code, it appears that removing all accents from usernames has been the behavior for quite a while. I traced the corresponding unit test back to when it was initially migrated from the old unit test subversion repository into the one used now in [25002], which was done during the 3.7 release cycle.

If I had to guess, the user must have been added manually somehow (maybe through PHPMyAdmin).

I'm going to close this out as invalid because this is intended behavior.