If your language does not need the PLURAL function at all, then explain this on the Support page. You may be able to get the check software to ignore missing PLURALs in your language.
(same for GENDER, from FAQ)
Korean does not need PLURAL/GENDER in the language (Singular and plural all have same following words, no per-gender words). So is it possible to ignore nonexisting PLURAL & GENDER instead of a workaround? (Or if it is not possible then please remove this line?)
We already ignore the plural checks for Korean in groups/check-blacklist.php, while we don't seem to have a specific checker for GENDER.