On May 26, 50 years ago, Chico Xavier visited the USA for the first time. Here’s one of his letters to his friend Nair in Brazil: https://www.youtube.com/watch?v=Lp7S-ewHios
The YouTube reading of the letter is in English and Chico wrote the letter in English.
From the description on YouTube:
In his trip to USA in 1966, Chico Xavier wrote in English a very touching letter to his friend Nair in Pedro Leopodo, Brazil. The letter is a true lesson of brotherhood, kindness, affection, obedience to the Higher Spirits. The letter was published in The Spiritist Magazine, issue 22 – Jul-Sep 2013