Simplify the following text for a Grade 8 native English-speaking person.
Original: Longvilliers ( until 1997 Longvillers ) is a commune in the Pas-de-Calais department in the Nord-Pas-de-Calais region of France .
Simplified: Longvilliers , Pas-de-Calais is a commune . It is found in the region Nord-Pas-de-Calais in the Pas-de-Calais department in the north of France .