BuddyPress.org

> or update the pot file with the latest version that includes the missing translation

ok, but there is no translation file containing that string. So I can add it to my po/mo file, but not the pot file, because that would be overwritten by the next plugin update.

I guess adding to the pot file has to be done by the plugin devs and my add to po/mo in a secured folder is only a workaround.