Historical dialects are variations of a language that were spoken in specific regions or by particular groups in the past. These dialects often reflect the cultural, social, and geographical influences of their time. For example, the Middle English dialects spoken during the Medieval period show significant differences from modern English, influenced by Norman French and Old Norse. Studying historical dialects helps linguists understand the evolution of languages and how they adapt over time. By examining texts and spoken records, researchers can trace changes in vocabulary, pronunciation, and grammar, revealing insights into the history and identity of communities.