Thanks to Fred Meyer, III for his mention of the article Vivu Esperanto! on pages 22 and 23 of the January 2022 issue of Rotary magazine. The article’s author is Joseph Derr. Here’s an excerpt:

Learn a few simple rules of grammar with a textbook like Complete Esperanto, and with the book’s lexicon beside you, you can talk with Rotary members around the world. …

[A]mong its speakers you’ll find the 57 members of Rotary’s Esperanto Fellowship—Rotaria Amikaro de Esperanto (RADE). The group, which traces its origins back to 1928, claims to be the oldest fellowship in Rotary.

RADE’s membroj, who live in 13 different landoj, use Esperanto at home and connect with fellow speakers via a smartphone app called Amikumu. …