Out of box, we supply sys_ui_message for all the OOB knowledge topics. "Known Error" is the only one not translated when a language is installed. This is because the sys_ui_message record key is "Known Errors" rather than "Known Error". For consistency, we should include the sys_ui_message records that match all the OOB knowledge topics.
Steps to Reproduce
Create a sys_ui_message record with the Key of Known Error with the appropriate translation for whatever language is being implemented.
Related Problem: PRB591634