Including the pope in these leaders may skew some of the takeaways about how leaders use their account. His content predictably differs widely from the other leaders on this list, but each of the accounts is unique in certain ways.
President Widodo of Indonesia signs 95% of his tweets with his initials, personalizing his messages and certifying in a sense that is indeed him behind the content. This saavy, hyper-engaged approach to social media has had profoundly positive effects on his political career.
His Royal Highness Sheikh Mohammed of the United Arab Emirates tweets regularly in English in addition to Arabic, and tailors his often tech-focused content to these (presumably) separate audiences.
Mexico’s president, Enrique Peña Nieto, has a more conventional account which has received significant foreign attention because of his attractive profile picture and Twitter feuding with President Trump.
There are many other distinctions for other leader accounts, both technical and content-based, but the thing that differentiates each of them is the specific idea of their own country that they are trying to both appeal to and represent.