How about the kosher MickeyD's in Tel Aviv and Jerusalem? Is it kosher to eat at those? I know cheeseburgers are out, unless the cheese is tofu "cheese".
The Kosher McDonald's in I Israel are closed on shabbos & do not serve cheeseburgers,furthermore both the Tel Aviv & Jerusalem rabbinate insisted that the signs on the kosher branches be blue as opposed to the normal red to distinguish the kosher ones from the non-kosher ones.
Kosher McDonald's outside of Jerusalem & Tel Aviv in for instance Mevasert Tzion & Beit Shean have the regular red signs but same rules ie no cheseburgers & closed on shabbos & kosher displayed prominantly on the sign in Hebrew & English.
I do not know about the one in Argentina you would have to ask a frum Jew from there.