Are the Polish Lowland Sheepdog and the Cursinu both native to Europe?
yes
Title: Catalan Sheepdog
Passage: The Catalan sheepdog (Catalan: "Gos d'atura català" , Spanish: "Pastor catalán" ) is a breed of Catalan pyrenean dog used as a sheepdog.  This dog is bred in Europe, especially in Spain, Finland, Germany, and Sweden.
Title: Cursinu
Passage: The Cursinu, is a breed of dog originating from Corsica.  It has existed on the island since the 16th century, but went into decline during the late 20th century; however it was saved and became recognized by the Société Centrale Canine.  Used for a variety of working purposes, it has no specific health issues.
Title: Polish Lowland Sheepdog
Passage: The Polish Lowland Sheepdog (Polish: "Polski Owczarek Nizinny" , also PON), is a medium-sized, shaggy-coated, sheep dog breed native to Poland.
Cursinu Polish Lowland Sheepdog