I already read this on another forum. So far this year of pontificate I can only find this speech announcing the canonization of John XXIII and John Paul II. The rest of his Latin-language use is only written material, which I don't know if is written by himself or others write it on his behalf, like his Twitter account (@Pontifex_ln) or his multiple documents in this language. It's been said that he knows Latin, but it's rustier than his predecessor's. I really like this language, not because I'm a Traditionalist (as my signature states).