Question: Mennonites are traditionally multilingual with which Low Prussian dialect of East Low German, with Dutch influence language was their first?

full_context: Document 1: Ostkäslausch: Ostkäslausch is a part of Low Prussian dialect of Low German spoken in an area of Poland, that used to be part of Germany. It used to be or is spoken in Warmia in East Prussia.
Document 2: Mundart des Weichselmündungsgebietes: The Mundart des Weichselmündungsgebietes (Vistula delta dialect) is a subdialect of Low Prussian, which belongs to East Low German. The dialect was spoken in the region at the mouth of the Vistula River, around the city of Danzig (Gdańsk), Poland.
Document 3: Mundart des Ostgebietes: The Mundart des Ostgebiets is a subdialect of Low Prussian, a dialect of Low German. It was spoken around Insterburg (now Chernyakhovsk, Russia), the Memel (Klaipėda, Lithuania), and Tilsit (Sovyetsk, Russia). Many speakers of this subdialect were Prussian Lithuanians.
Document 4: East Low German: East Low German (German: "Ostniederdeutsche Dialekte" ) is a group of Low German dialects spoken in north-eastern Germany as well as by minorities in northern Poland. Together with West Low German, it constitutes Low German. Before 1945, the dialect was spoken along the entire German Baltic Coast, from Mecklenburg, through Pomerania, West Prussia into certain villages of the East Prussian Klaipėda Region.
Document 5: Russian Mennonite: The Russian Mennonites (German: "Russlandmennoniten" occasionally Ukrainian Mennonites) are a group of Mennonites of German language, tradition and ethnicity, who are descendants of German-Dutch Anabaptists who settled for about 250 years in West Prussia and established colonies in the south west of the Russian Empire (present-day Ukraine) beginning in 1789. Since the late 19th century, many of them have come to countries throughout the Western Hemisphere. The rest were forcibly relocated, so that few of their descendants now live at the location of the original colonies. Russian Mennonites are traditionally multilingual with Plautdietsch (Mennonite Low German) as their first language and lingua franca. The term "Russian Mennonite" refers to the country where they resided after the split from Germany and not to their ethnic heritage. In 2014 there are several hundred thousand Russian Mennonites: about 200,000 in Germany, 100,000 in Mexico, 70,000 in Bolivia, 40,000 in Paraguay, 10,000 in Belize and tens of thousands in Canada and the US and a few thousand in Argentina, Uruguay and Brazil.
Document 6: History of the Jews in 19th-century Poland: Official Russian policy would eventually prove to be substantially harsher to the Jews than that under independent Polish rule. The lands that had once been Poland were to remain the home of many Jews, as, in 1772, Catherine II, the tzarina of Russia, instituted the Pale of Settlement, restricting Jews to the western parts of the empire, which would eventually include much Poland although it excluded some areas in which Jews had previously lived. By the late 19th century, over four million Jews would live in the Pale.
Document 7: West Low German: West Low German, also known as Low Saxon (German: "Niedersächsisch" or German: "Westniederdeutsch" ; literally: "Nether-saxon"; Low German: "Nedersassisch, Nedersaksies, Platduuts, Plat(t)" ; Dutch: "Nedersaksisch" ; ) is a group of Low German (also Low Saxon; German: "Niederdeutsch" or "Plattdeutsch", Dutch: "Nederduits") dialects spoken in parts of the Netherlands, northwestern Germany and southern Denmark (in North Schleswig by the German minority). It is one of two groups of mutually intelligible dialects, the other being East Low German dialects.
Document 8: Norwegians: Norwegians (Norwegian: "nordmenn" ) are a Germanic ethnic group native to Norway. They share a common culture and speak the Norwegian language. Norwegian people and their descendants are found in migrant communities worldwide, notably in the United States, Canada, Australia, Argentina, Chile, Uruguay, Brazil, Mexico, New Zealand, United Kingdom and South Africa.
Document 9: Lithuanians: Lithuanians (Lithuanian: "lietuviai" , singular "lietuvis/lietuvė") are a Baltic ethnic group, native to Lithuania, where they number around 2,561,300 people. Another million or more make up the Lithuanian diaspora, largely found in countries such as the United States, Argentina, Brazil, Canada, Colombia, Russia, United Kingdom and Ireland. Their native language is Lithuanian, one of only two surviving members of the Baltic language family. According to the census conducted in 2001, 83.45% of the population of Lithuania identified themselves as Lithuanians, 6.74% as Poles, 6.31% as Russians, 1.23% as Belarusians, and 2.27% as members of other ethnic groups. Most Lithuanians belong to the Roman Catholic Church, while the Lietuvininkai who lived in the northern part of East Prussia prior to World War II, were mostly Evangelical Lutherans.
Document 10: German Guatemalan: A German Guatemalan is a citizen of Guatemala whose ancestors were German settlers (along with other settlers from Belgium) who arrived in the 19th and 20th centuries. Guatemala had a massive immigration of Germans in the nineteenth century, the government of Justo Rufino Barrios these immigrants they were provided farmlands of coffee in the departments of Quetzaltenango, Alta Verapaz and Baja Verapaz, but by the early twentieth century came Germans in Guatemala City, Zacapa and Jutiapa, in these regions there are many descendants of these German people. Guatemala currently has a strong community of Germans who make up the majority of European immigrants in the country, is also the most numerous German community in all Central American countries.
Document 11: Dutch people: The Dutch (Dutch:    ), occasionally referred to as Netherlanders—a term that is cognate to the Dutch word for Dutch people, "Nederlanders"—are a Germanic ethnic group native to the Netherlands. They share a common culture and speak the Dutch language. Dutch people and their descendants are found in migrant communities worldwide, notably in Aruba, Suriname, Guyana, Curaçao, Chile, Argentina, Brazil, Canada, Australia, South Africa, New Zealand, and the United States.
Document 12: Flight and expulsion of Germans (1944–50): During the later stages of World War II and the post-war period, German citizens and people of German ancestry were expelled from various Eastern European countries and sent to the remaining territory of Germany and Austria. After 1950, some emigrated to the United States, Australia, and other countries from there. The areas affected included the former eastern territories of Germany, which were annexed by Poland and the Soviet Union after the war, as well as Germans who were living within the prewar borders of Poland, Czechoslovakia, Hungary, Romania, Yugoslavia, and the Baltic States. The Nazis had made plans—only partially completed before the Nazi defeat—to remove many Slavic and Jewish people from Eastern Europe and settle the area with Germans. The post war expulsion of the Germans formed a major part of the geopolitical and ethnic reconfiguration of Eastern Europe in the aftermath of World War II, that attempted to create ethnically homogeneous nations within redefined borders. Between 1944 and 1948 about 31 million people, including ethnic Germans ('Volksdeutsche') as well as German citizens ('Reichsdeutsche'), were permanently or temporarily moved from Central and Eastern Europe.
Document 13: Low Prussian dialect: Low Prussian (German: "Niederpreußisch" ), sometimes known simply as Prussian ("Preußisch"), is a dialect of East Low German that developed in East Prussia. Low Prussian was spoken in East and West Prussia and Danzig up to 1945. It developed on a Baltic substrate through the influx of Dutch- and Low-German-speaking immigrants. It overruled Old Prussian, which then became extinct in the 17th century.
Document 14: Plautdietsch language: Plautdietsch or Mennonite Low German, was originally a Low Prussian dialect of East Low German, with Dutch influence, that developed in the 16th and 17th centuries in the Vistula delta area of Royal Prussia. The term "Plautdietsch" literally translates to 'Low German', "plaut" meaning 'flat' (referring to the plains of northern Germany), and the term "Dietsch" originally meaning "of the Tribe", and referring to all the continental West Germanic peoples and their languages (i.e. Low German, Dutch, High German). In other Low German dialects, the word for Low German is usually realised as "Plattdütsch" or "Plattdütsk" , but the spelling "Plautdietsch" is used to refer specifically to the Vistula variant of the language.
Document 15: West Pomeranian dialect: West Pomeranian (German: "Westpommersch" or "Vorpommersch") is a dialect of the East Low German language and thus of the Low German language. It is spoken today in West Pomerania ("Vorpommern") in northeast Germany. Towards the west of the region it transitions gradually into Mecklenburgisch which, like West Pomeranian, belongs to the Mecklenburgisch-Vorpommersch dialect. Towards the south it mixes with Brandenburgisch. West Pomeranian has several West Slavic influences. Characteristic is a hard, terse speech.
ground_truth: Plautdietsch