Need help with assigning Kosovo to continent

General
#1 
Happy$continent <- countrycode(sourcevar = Happy[, "Country"],
                               origin = "country.name",
                               destination = "continent")

Warning: Some values were not matched unambiguously: Kosovo

I tried to use the countrycode to assign continent to the countries I have in the dataset, but Kosovo wouldnt be added. Anyone know how to assign Kosovo to a continent?

#2

This package is super crazy comprehensive. It seems to do everything except preparing menus of nation dishes. Look at the linked guide for custom country codes.