Language variation refers to the differences in language use among speakers based on factors such as region, social class, and context. These variations can be seen in accents, vocabulary, and grammar. For example, the English spoken in the United States differs from that spoken in the United Kingdom, showcasing regional dialects. Another aspect of language variation is sociolects, which are language forms used by specific social groups. These can include slang or jargon unique to certain professions or communities. Understanding language variation helps linguists study how languages evolve and how cultural identity is expressed through speech.