(Reuters) – Pope Francis will deliver all but four of his 18 addresses during his forthcoming visit to the United States in Spanish because he is still not comfortable speaking in English, the Vatican said on Tuesday.

At a briefing on the trip, which will start in Cuba on Saturday, Vatican spokesman Father Federico Lombardi also said it was “highly likely” that Francis would meet with the island’s revolutionary leader, 89-year-old Fidel Castro.

The meeting with Castro is not on official agenda and Vatican officials said it depended on the former president’s health.

As he has in past foreign trips, Lombardi said Francis will shun bulletproof cars and use mostly open jeeps in both Cuba and the United States, where he will visit Washington, New York and Philadelphia.

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