It happens on a planet inhabited by humanoids. The main character grew up in a society where they don't speak about themselves at all. When they talk they refer to themselves in third person, like "someone thinks", "it could be thought". Speaking about wishes, emotions etc is a taboo. The main character, a young male, is of noble descent, maybe even an heir, decides to leave his country. He travels around, encounters different societies and accepts internally that people can also talk and refer to themselves with "I". There were no aliens, and no focus on fighting.
The story / novel was written before 1995 (that's when I read it). It's too long for a story, too short for a book, probably 50 to 150 pages. The story is written in first-person, but I might be wrong there.
I read this around the same time that I read "The Left Hand of Darkness" by Ursula K Le Guin, and I can feel a similar atmosphere in the book.