The document discusses key concepts in Sesotho including leikemisa (verb), moetsi (agent), and moetsuoa (patient). It provides examples of how these terms are used in sentences and defines their meanings. For example, it states that a moetsi is a person or thing that causes an action while a moetsuoa is a person or thing an action is done to. It also discusses the relationship between lereho (noun) and seemeli (pronoun) in Sesotho.