Simplify the following text for a Grade 9 native English-speaking person.
Original: The Polish people , or Poles ( , singular Polak ) as a nation , they are bounded by the Polish language , which belongs to the Lechitic subgroup of west slavic languages of Central Europe , living mainly in Poland .
Simplified: The Polish people , or Poles ( , singular Polak ) are a nation indigenous to Poland . They are bonded by the Polish language , which belongs to the Lechitic subgroup of West Slavic languages of Central Europe .