The Latino community in Bolinas plays a crucial role in keeping the village running. But when it comes to civic affairs—even when the conversation is about them—Latinos are often absent.

Will Bartlett, founder of the new Bolinas Civic Group, has devised a way to overcome the language barrier that prevents many people from participating in the community meetings he has organized each month since March. A former engineer at Apple, Mr. Bartlett developed software that…