Middle Frisian is a historical language that was spoken in the Friesland region of the Netherlands and Germany from the 12th to the 16th centuries. It is part of the Frisian languages, which are closely related to English and Dutch. Middle Frisian evolved from Old Frisian and eventually transitioned into Modern Frisian. The language was used in various forms of literature, legal documents, and everyday communication. Middle Frisian is significant for understanding the development of the Frisian languages and their cultural heritage. Today, it is studied by linguists and historians interested in the evolution of regional languages in Europe.