In what language is the text of "Dies irae" written?

The text of "Dies irae" is written in Latin, which is significant as it is a historic and liturgical piece that originated in the Middle Ages. It is part of the Roman Catholic Requiem Mass, and its composition dates back to the 13th century. Latin, being the language of the Church and scholarly works during that time, was the medium for many religious texts, including this one. The use of Latin reflects the traditions and cultural context of the period when "Dies irae" was composed, making it an essential part of the liturgical heritage. Understanding this context is crucial for appreciating the text's historical significance and its role within the broader frameworks of music and religious practice.