Question: Despite being located in East Belgium, the Carnival of the birth place of Guido Maus harks purely to an area. What was the language having the same name as this area of the era with Fastrada's spouse's name later known as?

Knowledge 1: Fastrada
Fastrada became the third wife of Charlemagne, marrying him in October 783 at Worms, Germany, a few months after Queen Hildegard’s death. A probable reason behind the marriage was to solidify a Frankish alliance east of the Rhine when Charles was still fighting the Saxons. [SEP] Knowledge 2: Guido Maus
Guido Maus (born 5 November 1964, Malmedy) is a Belgian-born gallery owner, gallerist, curator, and long-time collector of contemporary art currently living and working in Birmingham, Alabama. [SEP] Knowledge 3: Rhine
The Rhine is the longest river in Germany. It is here that the Rhine encounters some more of its main tributaries, such as the Neckar, the Main and, later, the Moselle, which contributes an average discharge of more than 300 m3/s (11,000 cu ft/s). Northeastern France drains to the Rhine via the Moselle; smaller rivers drain the Vosges and Jura Mountains uplands. Most of Luxembourg and a very small part of Belgium also drain to the Rhine via the Moselle. As it approaches the Dutch border, the Rhine has an annual mean discharge of 2,290 m3/s (81,000 cu ft/s) and an average width of 400 m (1,300 ft). [SEP] Knowledge 4: Carnival
The Carnival of Malmedy is locally called Cwarmê. Even if Malmedy is located in the east Belgium, near the German-speaking area, the Cwarmê is a pure walloon and Latin carnival. The celebration takes place during 4 days before the Shrove Tuesday. The Cwarmê Sunday is the most important and insteresting to see. All the old traditional costumes parade in the street. The Cwarmê is a "street carnival" and is not only a parade. People who are disguised pass through the crowd and perform a part of the traditional costume they wear. The famous traditional costumes at the Cwarmê of Malmedy are the Haguète, the Longuès-Brèsses and the Long-Né.
Knowledge 1: Guido Maus
Guido Maus (born 5 November 1964, Malmedy) is a Belgian-born gallery owner, gallerist, curator, and long-time collector of contemporary art currently living and working in Birmingham, Alabama. [SEP] Knowledge 2: Carnival
The Carnival of Malmedy is locally called Cwarmê. Even if Malmedy is located in the east Belgium, near the German-speaking area, the Cwarmê is a pure walloon and Latin carnival. The celebration takes place during 4 days before the Shrove Tuesday. The Cwarmê Sunday is the most important and insteresting to see. All the old traditional costumes parade in the street. The Cwarmê is a "street carnival" and is not only a parade. People who are disguised pass through the crowd and perform a part of the traditional costume they wear. The famous traditional costumes at the Cwarmê of Malmedy are the Haguète, the Longuès-Brèsses and the Long-Né. [SEP] Knowledge 3: Fastrada
Fastrada became the third wife of Charlemagne, marrying him in October 783 at Worms, Germany, a few months after Queen Hildegard’s death. A probable reason behind the marriage was to solidify a Frankish alliance east of the Rhine when Charles was still fighting the Saxons. [SEP] Knowledge 4: Middle Ages
Charlemagne's court in Aachen was the centre of the cultural revival sometimes referred to as the "Carolingian Renaissance". Literacy increased, as did development in the arts, architecture and jurisprudence, as well as liturgical and scriptural studies. The English monk Alcuin (d. 804) was invited to Aachen and brought the education available in the monasteries of Northumbria. Charlemagne's chancery—or writing office—made use of a new script today known as Carolingian minuscule,[M] allowing a common writing style that advanced communication across much of Europe. Charlemagne sponsored changes in church liturgy, imposing the Roman form of church service on his domains, as well as the Gregorian chant in liturgical music for the churches. An important activity for scholars during this period was the copying, correcting, and dissemination of basic works on religious and secular topics, with the aim of encouraging learning. New works on religious topics and schoolbooks were also produced. Grammarians of the period modified the Latin language, changing it from the Classical Latin of the Roman Empire into a more flexible form to fit the needs of the church and government. By the reign of Charlemagne, the language had so diverged from the classical that it was later called Medieval Latin.
Knowledge 1: Guido Maus
Guido Maus (born 5 November 1964, Malmedy) is a Belgian-born gallery owner, gallerist, curator, and long-time collector of contemporary art currently living and working in Birmingham, Alabama. [SEP] Knowledge 2: Carnival
The Carnival of Malmedy is locally called Cwarmê. Even if Malmedy is located in the east Belgium, near the German-speaking area, the Cwarmê is a pure walloon and Latin carnival. The celebration takes place during 4 days before the Shrove Tuesday. The Cwarmê Sunday is the most important and insteresting to see. All the old traditional costumes parade in the street. The Cwarmê is a "street carnival" and is not only a parade. People who are disguised pass through the crowd and perform a part of the traditional costume they wear. The famous traditional costumes at the Cwarmê of Malmedy are the Haguète, the Longuès-Brèsses and the Long-Né. [SEP] Knowledge 3: Fastrada
Fastrada became the third wife of Charlemagne, marrying him in October 783 at Worms, Germany, a few months after Queen Hildegard’s death. A probable reason behind the marriage was to solidify a Frankish alliance east of the Rhine when Charles was still fighting the Saxons. [SEP] Knowledge 4: Rhine
The Rhine is the longest river in Germany. It is here that the Rhine encounters some more of its main tributaries, such as the Neckar, the Main and, later, the Moselle, which contributes an average discharge of more than 300 m3/s (11,000 cu ft/s). Northeastern France drains to the Rhine via the Moselle; smaller rivers drain the Vosges and Jura Mountains uplands. Most of Luxembourg and a very small part of Belgium also drain to the Rhine via the Moselle. As it approaches the Dutch border, the Rhine has an annual mean discharge of 2,290 m3/s (81,000 cu ft/s) and an average width of 400 m (1,300 ft).

Answer: Medieval Latin