For the "Custom Date Edit Format", "Custom Date Format", and "Custom Date Search Format" parameters for Date and Datetime fields? Currently you can't since they don't pass through translation API. If you're not using custom you should be able to use the UE_DATE_FORMAT and UE_TIME_FORMAT language keys in language overrides to localize all date and time displays. Have added a feature ticket to improve those parameters with translation support.
forge.joomlapolis.com/issues/7706