Proper noun
Low Prussian
A dialect of East Low German that developed in Prussia (East Prussia, West Prussia and Danzig), influenced to some extent by Dutch and Old Prussian, and to a small extent by Polish, Latvian, Lithuanian and Russian, which is now spoken in Germany and which gave rise Plautdietsch.
Revived Old Prussian A few linguists and philogogists are involved in reviving a reconstructed form of the language from Luther's catechisms, the Elblągian dictionary, place names, and Prussian loan words in the Low Prussian dialect of German. Source: Internet