one thing where i think russian as a language does well is in having words like свой/своя/своё/свои - it means "his/her/their" in a way that makes clear the object belongs to the subject and not someone else.

он открыл его книгу: "he opened his book", with the implication that the first "he" is not the owner/creator of the book
он открыл свою книгу: also "he opened his book", but in this case the book clearly belongs to the person who opened it