According https://openid.net/specs/openid-connect-core-1_0.html#rfc.section.3.1.2.1 ui_locales are end-User's preferred languages and scripts for the user interface This parameter is ignored and does not imply any warning or error.
According https://openid.net/specs/openid-connect-core-1_0.html#rfc.section.3.1.2.1
ui_locales are end-User's preferred languages and scripts for the user interface
This parameter is ignored and does not imply any warning or error.