CB

"Custom Date Edit Format", "Custom Date Format", and "Custom Date Search Format" parameters are not currently being passed through CBTxt to allow for localized formats using language strings. You can only localize globally with UE_DATE_FORMAT and UE_TIME_FORMAT. Implement support for language strings in those parameters.

https://www.joomlapolis.com/forum/255-developer-members-support/241538-multilanguage-date-format#314152