Simplify the following text for a Grade 13 native English-speaking person.
Original: In 1730 the neighbors of the Polish-Lithuanian Commonwealth ( Rzeczpospolita ) , namely Prussia , Austria and Russia , signed a secret agreement in order to maintain the status quo : specifically , to ensure that the Commonwealth laws would not change .
Simplified: In 1730 Commonwealth 's neighbors , namely Prussia , Austria and Russia , signed a secret agreement in order to maintain the status quo : specifically , to ensure that the Commonwealth laws would not change .