Question: Mennonites are traditionally multilingual with which Low Prussian dialect of East Low German, with Dutch influence language was their first?
Sentence (from "Plautdietsch language"): 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.
Relevant evidence: No