If you would like to check the status of a language, volunteer to do a translation, or highlight or correct a problem in one of the existing language files then post here.
There is an existing Spanish/Argentinian translation in zm_lang_es_ar.php however I don't think it's quite up to date. You can just edit that one, or create an es_es version and mail it to me. You might want to wait a couple of days as 1.20.2 has quite a lot of new tokens in it and you might end up having to do everything twice otherwise.
There is still only the Argentinian translation but that is getting old now and needs updating. So if you can update it, or create a new one, then that would be great.