I am not sure if a languague needs adding common names if it has not so many common names.
Maybe those people do not use iNaturalist? I know dutch people want to have their common names to be added: https://forum.inaturalist.org/t/please-add-to-inat-free-to-use-list-with-all-19386-official-dutch-species-names/13024
https://www.inaturalist.org/check_lists/4088583-Vaatplanten-without-common-names?page=11